UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                    Form 13F

                              Form 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: December 31, 2006

Check here if Amendment [  ]; Amendment Number:
This Amendment (Check only one.): [  ] is a restatement.
                                  [  ] adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:    The Bank of Nova Scotia
Address: 40 King St. West
         Scotia Plaza 9th Floor
         Toronto, Ontario,   M5H 1H1

13F File Number:  28-11475

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:

Name:      Maria Theofilaktidis
Title:     Vice President, Financial Accounting and Controls
Phone:     416-866-4269

Signature, Place, and Date of Signing:

     /s/ Maria Theofilaktidis     Toronto, Ontario, Canada     February 05, 2007


Report Type (Check only one.):

[  ]         13F HOLDINGS REPORT.

[  ]         13F NOTICE.

[ X]         13F COMBINATION REPORT.


List of Other Managers Reporting for this Manager:

       Form 13F File Number          Name

       28-11461                      Scotia Capital Inc.
       28-11460                      Scotia Cassels Investment Counsel Ltd.
       28-11459                      Bank of Nova Scotia Trust Co.



                              FORM 13F SUMMARY PAGE


Report Summary:

Number of Other Included Managers:         1

Form13F Information Table Entry Total:     154

Form13F Information Table Value Total:     $17,419,712 (thousands)


List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s) of all
institutional managers with respect to which this report is filed, other
than the manager filing this report.

No.  13F File Number               Name


1    28-11472                      BNS Investments Inc.




                                    
                                                     FORM 13F INFORMATION TABLE
                                                             VALUE  SHARES/ SH/ PUT/ INVSTMT  OTHER            VOTING AUTHORITY
NAME OF ISSUER                 TITLE OF CLASS   CUSIP     (x$1000)  PRN AMT PRN CALL DSCRETN MANAGERS         SOLE   SHARED     NONE
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
3M CO                          COM              88579Y101     1307    16845 SH       DEFINED                 16845        0        0
ABITIBI-CONSOLIDATED INC       COM              003924107    25813 10061032 SH       SOLE                 10061032        0        0
AGNICO EAGLE MINES LTD         COM              008474108     7750   187800 SH       SOLE                   187800        0        0
AGRIUM INC                     COM              008916108     7470   238255 SH       SOLE                   238255        0        0
ALCAN INC                      COM              013716105   119388  2450423 SH       SOLE                  2450423        0        0
ALCOA INC                      COM              013817101      481    16095 SH       DEFINED                 16095        0        0
ALTRIA GROUP INC               COM              02209S103     1371    16045 SH       DEFINED                 16045        0        0
AMERICAN EXPRESS CO            COM              025816109      973    16095 SH       DEFINED                 16095        0        0
AMERICAN INTL GROUP INC        COM              026874107     1150    16115 SH       DEFINED                 16115        0        0
ANGIOTECH PHARMACEUTICALS IN   COM              034918102     1341   766800 SH       SOLE                   766800        0        0
ANHEUSER BUSCH COS INC         COM              035229103     3690    75000 SH       SOLE                    75000        0        0
AT&T INC                       COM              00206R102      591    16595 SH       DEFINED                 16595        0        0
AT&T INC                       COM              00206R102     4285   119855 SH       SOLE                   119855        0        0
AXCAN PHARMA INC               COM              054923107     7930        1 SH       SOLE                        1        0        0
BANK MONTREAL QUE              COM              063671101  1308549 22101195 SH       SOLE                 22101195        0        0
BANK OF AMERICA CORPORATION    COM              060505104    10678   200000 SH       SOLE                   200000        0        0
BARRICK GOLD CORP              COM              067901108   129916  4223264 SH       SOLE                  4223264        0        0
BCE INC                        COM NEW          05534B760    17257   640500 SH       SOLE    1              640500        0        0
BCE INC                        COM NEW          05534B760   936193 34746470 SH       SOLE                 34746470        0        0
BIOVAIL CORP                   COM              09067J109     4506   213469 SH       SOLE                   213469        0        0
BOEING CO                      COM              097023105     1424    16095 SH       DEFINED                 16095        0        0
BRISTOL MYERS SQUIBB CO        COM              110122108     2632   100000 SH       SOLE                   100000        0        0
BROOKFIELD ASSET MGMT INC      CL A LTD VT SH   112585104   620228 12824936 SH       SOLE                 12824936        0        0
BROOKFIELD PPTYS CORP          COM              112900105    98279  2492590 SH       SOLE                  2492590        0        0
CAE INC                        COM              124765108    18233  1976657 SH       SOLE                  1976657        0        0
CAMECO CORP                    COM              13321L108    42134  1040316 SH       SOLE                  1040316        0        0
CANADIAN NAT RES LTD           COM              136385101   164913  3092361 SH       SOLE                  3092361        0        0
CANADIAN NATL RY CO            COM              136375102   338159  7870798 SH       SOLE                  7870798        0        0
CANADIAN PAC RY LTD            COM              13645T100    43721   829837 SH       SOLE                   829837        0        0
CARDIOME PHARMA CORP           COM NEW          14159U202    10418        1 SH       SOLE                        1        0        0
CATERPILLAR INC DEL            COM              149123101     1044    17090 SH       DEFINED                 17090        0        0
CDN IMPERIAL BK OF COMMERCE    COM              136069101  1243712 14744881 SH       SOLE                 14744881        0        0
CELESTICA INC                  SUB VTG SHS      15101Q108     8481   307075 SH       SOLE                   307075        0        0
CHC HELICOPTER CORP            CL A SUB VTG     12541C203    24697  1170000 SH       SOLE                  1170000        0        0
CHESAPEAKE ENERGY CORP         COM              165167107     7263   250000 SH       SOLE                   250000        0        0
CITIGROUP INC                  COM              172967101      852    15330 SH       DEFINED                 15330        0        0
CITIGROUP INC                  COM              172967101    16710   300000 SH       SOLE                   300000        0        0
CNX GAS CORP                   COM              12618H309     2550   100000 SH       SOLE                   100000        0        0
COCA COLA CO                   COM              191216100    13510   280000 SH       SOLE                   280000        0        0
COCA COLA CO                   COM              191216100      773    16095 SH       DEFINED                 16095        0        0
COGNOS INC                     COM              19244C109    10597   139822 SH       SOLE                   139822        0        0
COMPTON PETE CORP              COM              204940100     5751        1 SH       SOLE                        1        0        0
CONCUR TECHNOLOGIES INC        COM              206708109      236    14709 SH       SOLE                    14709        0        0
CONOCOPHILLIPS                 COM              20825C104     8994   125000 SH       SOLE                   125000        0        0
CONSOL ENERGY INC              COM              20854P109     3213   100000 SH       SOLE                   100000        0        0
CORUS ENTERTAINMENT INC        COM CL B NON VTG 220874101     9737   273433 SH       SOLE                   273433        0        0
COTT CORP QUE                  COM              22163N106     1599   111639 SH       SOLE                   111639        0        0
CVS CORP                       COM              126650100    10819   350000 SH       SOLE                   350000        0        0
DISNEY WALT CO                 COM DISNEY       254687106      549    16095 SH       DEFINED                 16095        0        0
DOLLAR TREE STORES INC         COM              256747106     3010   100000 SH       SOLE                   100000        0        0
DOMTAR INC                     COM              257561100     4615   546032 SH       SOLE                   546032        0        0
DORAL FINL CORP                COM              25811P100      718   250000 SH       SOLE                   250000        0        0
DOREL INDS INC                 CL B SUB VTG     25822C205     3686        1 SH       SOLE                        1        0        0
DOW CHEM CO                    COM              260543103     2996    75000 SH       SOLE                    75000        0        0
DU PONT E I DE NEMOURS & CO    COM              263534109      810    16695 SH       DEFINED                 16695        0        0
ENBRIDGE INC                   COM              29250N105   530228 15344615 SH       SOLE                 15344615        0        0
ENCANA CORP                    COM              292505104   283044  6147215 SH       SOLE                  6147215        0        0
ENTERRA ENERGY TR              TR UNIT          29381P102     1786   225000 SH       SOLE                   225000        0        0
EXXON MOBIL CORP               COM              30231G102     1225    16045 SH       DEFINED                 16045        0        0
EXXON MOBIL CORP               COM              30231G102     5747    75000 SH       SOLE                    75000        0        0
FAIRFAX FINL HLDGS LTD         SUB VTG          303901102    44337   223034 SH       SOLE                   223034        0        0
FORDING CDN COAL TR            TR UNIT          345425102     3793   183800 SH       SOLE                   183800        0        0
GENERAL ELECTRIC CO            COM              369604103      596    16095 SH       DEFINED                 16095        0        0
GENERAL MTRS CORP              COM              370442105      511    16695 SH       DEFINED                 16695        0        0
GENEREX BIOTECHNOLOGY CP DEL   COM              371485103      780   500000 SH       SOLE                   500000        0        0
GOLDCORP INC NEW               COM              380956409    31047  1092788 SH       SOLE                  1092788        0        0
GROUPE CGI INC                 CL A SUB VTG     39945C109     6020        1 SH       SOLE                        1        0        0
HEWLETT PACKARD CO             COM              428236103      693    16895 SH       DEFINED                 16895        0        0
HEWLETT PACKARD CO             COM              428236103      319     8000 SH       DEFINED 1                8000        0        0
HOME DEPOT INC                 COM              437076102      644    16095 SH       DEFINED                 16095        0        0
HONEYWELL INTL INC             COM              438516106      748    16595 SH       DEFINED                 16595        0        0
IMPERIAL OIL LTD               COM NEW          453038408   316553  8593323 SH       SOLE                  8593323        0        0
INTEL CORP                     COM              458140100      325    16095 SH       DEFINED                 16095        0        0
INTEL CORP                     COM              458140100     6075   300000 SH       SOLE                   300000        0        0
INTERNATIONAL BUSINESS MACHS   COM              459200101     1630    16845 SH       DEFINED                 16845        0        0
INTEROIL CORP                  COM              460951106     8602   284470 SH       SOLE                   284470        0        0
IPSCO INC                      COM              462622101    14424   153400 SH       SOLE                   153400        0        0
ISHARES INC                    MSCI JAPAN       464286848      712    50000 SH       SOLE                    50000        0        0
ISHARES TR                     DJ US REAL EST   464287739     2600    31030 SH       SOLE                    31030        0        0
ISHARES TR                     MSCI EAFE IDX    464287465      497     6780 SH       SOLE                     6780        0        0
ISHARES TR                     MSCI EMERG MKT   464287234      870     7620 SH       SOLE                     7620        0        0
IVANHOE MINES LTD              COM              46579N103     2102        1 SH       SOLE                        1        0        0
JOHNSON & JOHNSON              COM              478160104     1055    16045 SH       DEFINED                 16045        0        0
JP MORGAN CHASE & CO           COM              46625H100      774    16095 SH       DEFINED                 16095        0        0
KINROSS GOLD CORP              COM NO PAR       496902404     6688   563979 SH       SOLE                   563979        0        0
LUNDIN MINING CORP             COM              550372106     5431   147200 SH       SOLE                   147200        0        0
MAGNA INTL INC                 CL A             559222401   287874  3573967 SH       SOLE                  3573967        0        0
MANULIFE FINL CORP             COM              56501R106  1710265 50651661 SH       SOLE                 50651661        0        0
MCDONALDS CORP                 COM              580135101      733    16595 SH       DEFINED                 16595        0        0
MDS INC                        COM              55269P302     7818   428374 SH       SOLE                   428374        0        0
MEMC ELECTR MATLS INC          COM              552715104     1957    50000 SH       SOLE                    50000        0        0
MERCK & CO INC                 COM              589331107      734    16895 SH       DEFINED                 16895        0        0
MERIDIAN GOLD INC              COM              589975101      452        1 SH       SOLE                        1        0        0
METHANEX CORP                  COM              59151K108    38322  1399998 SH       SOLE                  1399998        0        0
MI DEVS INC                    CL A SUB VTG     55304X104    34646   968262 SH       SOLE                   968262        0        0
MICROSOFT CORP                 COM              594918104      501    16845 SH       DEFINED                 16845        0        0
MOLSON COORS BREWING CO        CL B             60871R209     5856    76667 SH       SOLE                    76667        0        0
NEUROCHEM INC                  COM              64125K101     2779   129516 SH       SOLE                   129516        0        0
NEXEN INC                      COM              65334H102    81631  1481824 SH       SOLE                  1481824        0        0
NISOURCE INC                   COM              65473P105     7230   300000 SH       SOLE                   300000        0        0
NOKIA CORP                     SPONSORED ADR    654902204      204    10000 SH       DEFINED 1               10000        0        0
NORTEL NETWORKS CORP NEW       COM NEW          656568508    31631   674615 SH       SOLE                   674615        0        0
NORTH AMERN PALLADIUM LTD      COM              656912102     1767   232179 SH       SOLE                   232179        0        0
NORTHGATE MINERALS CORP        COM              666416102      473   135100 SH       SOLE                   135100        0        0
NOVA CHEMICALS CORP            COM              66977W109    49920  1790043 SH       SOLE                  1790043        0        0
NOVELIS INC                    COM              67000X106    13382   478538 SH       SOLE                   478538        0        0
OPPENHEIMER HLDGS INC          CL A NON VTG     683797104      280     8336 SH       SOLE                     8336        0        0
ORBITAL SCIENCES CORP          COM              685564106      267    14500 SH       DEFINED 1                   0        0    14500
PATTERSON UTI ENERGY INC       COM              703481101     4646   200000 SH       SOLE                   200000        0        0
PENN WEST ENERGY TR            TR UNIT          707885109     9025   295700 SH       SOLE                   295700        0        0
PETRO-CDA                      COM              71644E102   124650  3042255 SH       SOLE                  3042255        0        0
PFIZER INC                     COM              717081103      415    16095 SH       DEFINED                 16095        0        0
PFIZER INC                     COM              717081103    19425   750000 SH       SOLE                   750000        0        0
PHARMACEUTICAL HLDRS TR        DEPOSITRY RCPT   71712A206     7706   100000 SH       SOLE                   100000        0        0
POPULAR INC                    COM              733174106     2693   150000 SH       SOLE                   150000        0        0
POTASH CORP SASK INC           COM              73755L107    53088   370473 SH       SOLE                   370473        0        0
PRECISION DRILLING TR          TR UNIT          740215108      579    25000 SH       SOLE                    25000        0        0
PRIMEWEST ENERGY TR            TR UNIT NEW      741930309     7379   400000 SH       SOLE                   400000        0        0
PROCTER & GAMBLE CO            COM              742718109     1081    16895 SH       DEFINED                 16895        0        0
PROGRESS ENERGY INC            COM              743263105     5350   109000 SH       SOLE                   109000        0        0
QUALCOMM INC                   COM              747525103     2974    78700 SH       SOLE                    78700        0        0
QUEBECOR WORLD INC             COM NON-VTG      748203106    27572  2380193 SH       SOLE                  2380193        0        0
RESEARCH IN MOTION LTD         COM              760975102    30904   241716 SH       SOLE                   241716        0        0
ROGERS COMMUNICATIONS INC      CL B             775109200    15717   263933 SH       SOLE                   263933        0        0
ROYAL BK CDA MONTREAL QUE      COM              780087102  2715513 57020884 SH       SOLE                 57020884        0        0
SCHERING PLOUGH CORP           COM              806605101     7762   328325 SH       SOLE                   328325        0        0
SHAW COMMUNICATIONS INC        CL B CONV        82028K200     9523   300678 SH       SOLE                   300678        0        0
SILVER STD RES INC             COM              82823L106     4590        1 SH       SOLE                        1        0        0
SILVER WHEATON CORP            COM              828336107      800    76294 SH       SOLE                    76294        0        0
SLM CORP                       COM              78442P106   191676  3930200 SH       SOLE                  3930200        0        0
SMTC CORP                      COM NEW          832682207     1323   469082 SH       SOLE                   469082        0        0
SOURCE INTERLINK COS INC       COM NEW          836151209      543    60035 SH       SOLE                    60035        0        0
SPDR TR                        UNIT SER 1       78462F103      377     2660 SH       SOLE                     2660        0        0
SUN LIFE FINL INC              COM              866796105   823391 19456198 SH       SOLE                 19456198        0        0
SUNCOR ENERGY INC              COM              867229106   172307  2187674 SH       SOLE                  2187674        0        0
TALISMAN ENERGY INC            COM              87425E103   400970 23600565 SH       SOLE                 23600565        0        0
TECK COMINCO LTD               CL B             878742204   346305  4591403 SH       SOLE                  4591403        0        0
TELUS CORP                     NON-VTG SHS      87971M202   263056  5892084 SH       SOLE                  5892084        0        0
TEXAS INSTRS INC               COM              882508104     7176   150001 SH       SOLE                   150001        0        0
THOMSON CORP                   COM              884903105   413114  9951282 SH       SOLE                  9951282        0        0
TIM HORTONS INC                COM              88706M103     8693   300700 SH       SOLE                   300700        0        0
TORONTO DOMINION BK ONT        COM NEW          891160509  1899982 31759020 SH       SOLE                 31759020        0        0
TRANSALTA CORP                 COM              89346D107    53719  2350000 SH       SOLE    1             2350000        0        0
TRANSALTA CORP                 COM              89346D107   144045  6301437 SH       SOLE                  6301437        0        0
TRANSCANADA CORP               COM              89353D107   696873 19998427 SH       SOLE                 19998427        0        0
TRANSCANADA CORP               COM              89353D107    37460  1075000 SH       SOLE    1             1075000        0        0
UNITED TECHNOLOGIES CORP       COM              913017109     1052    16890 SH       DEFINED                 16890        0        0
VALERO ENERGY CORP NEW         COM              91913Y100    10232   200000 SH       SOLE                   200000        0        0
VERIZON COMMUNICATIONS         COM              92343V104      597    16095 SH       DEFINED                 16095        0        0
VERIZON COMMUNICATIONS         COM              92343V104     3724   100000 SH       SOLE                   100000        0        0
WAL MART STORES INC            COM              931142103      775    16845 SH       DEFINED                 16845        0        0
WAL MART STORES INC            COM              931142103     5773   125000 SH       SOLE                   125000        0        0
WEIGHT WATCHERS INTL INC NEW   COM              948626106     3653    69534 SH       DEFINED 1                   0        0    69534
WILLIAMS COS INC DEL           COM              969457100     5224   200000 SH       SOLE                   200000        0        0