UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 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 May 11, 2006 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: 141 Form13F Information Table Value Total: $15,804,367 (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 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 1181 15645 SH Defined 15645 ABITIBI-CONSOLIDATED INC COM 003924107 29013 7016032 SH Sole 7016032 ADVANTAGE ENERGY INCOME FD TR UNIT 00762L101 7619 399249 SH Sole 399249 AGRIUM INC COM 008916108 6178 244955 SH Sole 244955 ALCAN INC COM 013716105 110704 2420023 SH Sole 2420023 ALCOA INC COM 013817101 503 16495 SH Defined 16495 ALTRIA GROUP INC COM 02209S103 1106 15645 SH Defined 15645 AMERICAN EXPRESS CO COM 025816109 865 16495 SH Defined 16495 AMERICAN INTL GROUP INC COM 026874107 1087 16495 SH Defined 16495 ANHEUSER BUSCH COS INC COM 035229103 3208 75000 SH Sole 75000 AT&T INC COM 00206R102 445 16495 SH Defined 16495 AT&T INC COM 00206R102 5269 194855 SH Sole 194855 ATI TECHNOLOGIES INC COM 001941103 6794 395995 SH Sole 395995 AVAYA INC COM 053499109 1130 100000 SH Sole 100000 BANK MONTREAL QUE COM 063671101 1246397 21941095 SH Sole 21941095 BANK OF AMERICA CORPORATION COM 060505104 9108 200000 SH Sole 200000 BARRICK GOLD CORP COM 067901108 115204 4235405 SH Sole 4235405 BCE INC COM 05534B109 964878 40063185 SH Sole 40063185 BCE INC COM 05534B109 16859 700000 SH Defined 1 700000 BIOVAIL CORP COM 09067J109 5548 228669 SH Sole 228669 BOEING CO COM 097023105 1282 16495 SH Defined 16495 BRISTOL MYERS SQUIBB CO COM 110122108 2461 100000 SH Sole 100000 BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 620486 11274541 SH Sole 11274541 BROOKFIELD PPTYS CORP COM 112900105 84555 2492690 SH Sole 2492690 CAE INC COM 124765108 17287 2199457 SH Sole 2199457 CAMECO CORP COM 13321L108 38103 1059616 SH Sole 1059616 CANADIAN NAT RES LTD COM 136385101 199743 3594749 SH Sole 3594749 CANADIAN NATL RY CO COM 136375102 345073 7616120 SH Sole 7616120 CANADIAN PAC RY LTD COM 13645T100 44166 885437 SH Sole 885437 CATERPILLAR INC DEL COM 149123101 1167 16290 SH Defined 16290 CDN IMPERIAL BK OF COMMERCE COM 136069101 1086581 14757281 SH Sole 14757281 CELESTICA INC SUB VTG SHS 15101Q108 3526 308975 SH Sole 308975 CHC HELICOPTER CORP CL A SUB VTG 12541C203 29651 1170000 SH Sole 1170000 CHESAPEAKE ENERGY CORP COM 165167107 4712 150000 SH Sole 150000 CISCO SYS INC COM 17275R102 288 15000 SH Defined 15000 CISCO SYS INC COM 17275R102 2167 100000 SH Sole 100000 CITIGROUP INC COM 172967101 769 16180 SH Defined 16180 CITIGROUP INC COM 172967101 9446 200000 SH Sole 200000 CNX GAS CORP COM 12618H309 1300 50000 SH Sole 50000 COCA COLA CO COM 191216100 689 16495 SH Defined 16495 COCA COLA CO COM 191216100 11724 280000 SH Sole 280000 COGNOS INC COM 19244C109 5531 142422 SH Sole 142422 COMCAST CORP NEW CL A 20030N101 3504 133927 SH Sole 133927 CONCUR TECHNOLOGIES INC COM 206708109 273 14709 SH Sole 14709 COTT CORP QUE COM 22163N106 1323 102739 SH Sole 102739 CVS CORP COM 126650100 5974 200000 SH Sole 200000 DISNEY WALT CO COM DISNEY 254687106 459 16495 SH Defined 16495 DOLLAR TREE STORES INC COM 256747106 8301 300000 SH Sole 300000 DOMTAR INC COM 257561100 4192 593632 SH Sole 593632 DORAL FINL CORP COM 25811P100 2888 250000 SH Sole 250000 DU PONT E I DE NEMOURS & CO COM 263534109 694 16495 SH Defined 16495 ELECTRONIC ARTS INC COM 285512109 5472 100000 SH Sole 100000 ENBRIDGE INC COM 29250N105 435221 15129115 SH Sole 15129115 ENCANA CORP COM 292505104 300017 6429715 SH Sole 6429715 EXXON MOBIL CORP COM 30231G102 950 15645 SH Defined 15645 EXXON MOBIL CORP COM 30231G102 21301 350000 SH Sole 350000 FAIRFAX FINL HLDGS LTD SUB VTG 303901102 19101 179634 SH Sole 179634 FAIRMONT HOTELS RESORTS INC COM 305204109 24516 550451 SH Sole 550451 FALCONBRIDGE LTD NEW 2005 COM 306104100 460066 13147967 SH Sole 13147967 GATEWAY INC COM 367626108 657 300000 SH Sole 300000 GENERAL ELECTRIC CO COM 369604103 1043 31495 SH Defined 31495 GENERAL MTRS CORP COM 370442105 350 16495 SH Defined 16495 GLAMIS GOLD LTD COM 376775102 6165 189000 SH Sole 189000 GOLDCORP INC NEW COM 380956409 14276 487988 SH Sole 487988 HEWLETT PACKARD CO COM 428236103 1013 31495 SH Defined 31495 HOME DEPOT INC COM 437076102 696 16495 SH Defined 16495 HONEYWELL INTL INC COM 438516106 704 16495 SH Defined 16495 IMPERIAL OIL LTD COM NEW 453038408 326939 3036941 SH Sole 3036941 INCO LTD COM 453258402 15029 301500 SH Sole 301500 INTEL CORP COM 458140100 973 50000 SH Sole 50000 INTEL CORP COM 458140100 1049 53495 SH Defined 53495 INTERNATIONAL BUSINESS MACHS COM 459200101 1748 21645 SH Defined 21645 INTERNATIONAL BUSINESS MACHS COM 459200101 16494 200000 SH Sole 200000 INTERNATIONAL RECTIFIER CORP COM 460254105 4143 100000 SH Sole 100000 INTEROIL CORP COM 460951106 3237 247400 SH Sole 247400 INTRAWEST CORPORATION COM NEW 460915200 8223 240844 SH Sole 240844 IPSCO INC COM 462622101 15428 148900 SH Sole 148900 ISHARES INC MSCI JAPAN 464286848 720 50000 SH Sole 50000 ISHARES TR MSCI EMERG MKT 464287234 715 7220 SH Sole 7220 ISHARES TR DJ US REAL EST 464287739 2098 28530 SH Sole 28530 ISHARES TR MSCI EAFE IDX 464287465 2090 32180 SH Sole 32180 JOHNSON & JOHNSON COM 478160104 1200 20645 SH Defined 20645 JP MORGAN CHASE & CO COM 46625H100 685 16495 SH Defined 16495 KINROSS GOLD CORP COM NO PAR 496902404 5394 494879 SH Sole 494879 MAGNA INTL INC CL A 559222401 266967 3541367 SH Sole 3541367 MANULIFE FINL CORP COM 56501R106 1211375 19313216 SH Sole 19313216 MCDONALDS CORP COM 580135101 565 16495 SH Defined 16495 MDS INC COM 55269P302 7711 428474 SH Sole 428474 MERCK & CO INC COM 589331107 580 16495 SH Defined 16495 MERCK & CO INC COM 589331107 17065 484400 SH Sole 484400 METHANEX CORP COM 59151K108 28647 1399998 SH Sole 1399998 MI DEVS INC CL A SUB VTG 55304X104 33629 965562 SH Sole 965562 MICROSOFT CORP COM 594918104 448 16495 SH Defined 16495 MOLSON COORS BREWING CO CL B 60871R209 5259 76667 SH Sole 76667 MOTOROLA INC COM 620076109 23322 1018000 SH Sole 1018000 NEXEN INC COM 65334H102 79683 1447424 SH Sole 1447424 NISOURCE INC COM 65473P105 6066 300000 SH Sole 300000 NORTEL NETWORKS CORP NEW NOTE 4.250% 9/0 656568AB8 1444 1500000 PRN Defined 1500000 NORTEL NETWORKS CORP NEW COM 656568102 20785 6800246 SH Sole 6800246 NOVA CHEMICALS CORP COM 66977W109 51182 1795743 SH Sole 1795743 NOVELIS INC COM 67000X106 11199 545918 SH Sole 545918 ORBITAL SCIENCES CORP COM 685564106 229 14500 SH Defined 1 14500 PATTERSON UTI ENERGY INC COM 703481101 3196 100000 SH Sole 100000 PETRO-CDA COM 71644E102 147300 3106655 SH Sole 3106655 PFIZER INC COM 717081103 410 16495 SH Defined 16495 PFIZER INC COM 717081103 19313 775000 SH Sole 775000 PHARMACEUTICAL HLDRS TR DEPOSITRY RCPT 71712A206 7140 100000 SH Sole 100000 PITNEY BOWES INC COM 724479100 8612 200600 SH Sole 200600 POTASH CORP SASK INC COM 73755L107 33249 377773 SH Sole 377773 PROCTER & GAMBLE CO COM 742718109 948 16495 SH Defined 16495 PROGRESS ENERGY INC COM 743263105 9192 209000 SH Sole 209000 QUEBECOR WORLD INC COM NON-VTG 748203106 30546 3113243 SH Sole 3113243 QWEST COMMUNICATIONS INTL IN COM 749121109 1360 200000 SH Sole 200000 RESEARCH IN MOTION LTD COM 760975102 24690 291616 SH Sole 291616 ROGERS COMMUNICATIONS INC CL B 775109200 9819 257433 SH Sole 257433 ROYAL BK CDA MONTREAL QUE COM 780087102 2421121 57441984 SH Sole 57441984 SCHERING PLOUGH CORP COM 806605101 15196 800200 SH Sole 800200 SHAW COMMUNICATIONS INC CL B CONV 82028K200 7661 321278 SH Sole 321278 SLM CORP COM 78442P106 144611 2784200 SH Sole 2784200 SMTC CORP COM NEW 832682207 788 469082 SH Sole 469082 SOURCE INTERLINK COS INC COM NEW 836151209 665 59612 SH Sole 59612 SPDR TR UNIT SER 1 78462F103 1995 15360 SH Sole 15360 SUN LIFE FINL INC COM 866796105 700593 16481229 SH Sole 16481229 SUNCOR ENERGY INC COM 867229106 170011 2215474 SH Sole 2215474 TALISMAN ENERGY INC COM 87425E103 419493 7900155 SH Sole 7900155 TELUS CORP NON-VTG SHS 87971M202 253100 6544634 SH Sole 6544634 THOMSON CORP COM 884903105 371244 9956682 SH Sole 9956682 TORONTO DOMINION BK ONT COM NEW 891160509 1651994 29653120 SH Sole 29653120 TRANSALTA CORP COM 89346D107 44787 2350000 SH Defined 1 2350000 TRANSALTA CORP COM 89346D107 115685 6070037 SH Sole 6070037 TRANSCANADA CORP COM 89353D107 576147 19986327 SH Sole 19986327 TRANSCANADA CORP COM 89353D107 35313 1225000 SH Defined 1 1225000 UNITED TECHNOLOGIES CORP COM 913017109 925 15990 SH Defined 15990 UST INC COM 902911106 12480 300000 SH Sole 300000 VERIZON COMMUNICATIONS COM 92343V104 560 16495 SH Defined 16495 VERIZON COMMUNICATIONS COM 92343V104 14476 425000 SH Sole 425000 WACHOVIA CORP 2ND NEW COM 929903102 1401 25000 SH Sole 25000 WAL MART STORES INC COM 931142103 784 16645 SH Defined 16645 WAL MART STORES INC COM 931142103 5905 125000 SH Sole 125000 WEIGHT WATCHERS INTL INC NEW COM 948626106 3574 69534 SH Defined 1 69534 ZALE CORP NEW COM 988858106 2803 100000 SH Sole 100000