CMTXX Cma Treasury Fund (MM)

000 B000000 03/31/2013
000 C000000 0000869311
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 BIF TREASURY FUND
001 B000000 811-06196
001 C000000 8002217210
002 A000000 100 BELLEVUE PARKWAY
002 B000000 WILMINGTON
002 C000000 DE
002 D010000 19809
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 N
007 B000000  0
007 C010100  1
010 A000001 BLACKROCK ADVISORS, LLC
010 B000001 801-47710
010 C010001 WILMINGTON
010 C020001 DE
010 C030001 19809
011 A000001 BLACKROCK INVESTMENTS, LLC
011 B000001 8-48436
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10022
012 A000001 FINANCIAL DATA SERVICES, INC.
012 B000001 84-01339
012 C010001 JACKSONVILLE
012 C020001 FL
012 C030001 32246
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 BOSTON
013 B020001 MA
013 B030001 02116
014 A000001 BLACKROCK CAPITAL MARKETS, LLC
014 B000001 8-67827
014 A000002 BLACKROCK EXECUTION SERVICES
014 B000002 8-48719
014 A000003 BLACKROCK INVESTMENTS, LLC
014 B000003 8-48436
014 A000004 HARRIS WILLIAMS LLC
014 B000004 8-53380
014 A000005 PNC CAPITAL MARKETS, INC.

014 B000005 8-32493
014 A000006 PNC INVESTMENTS LLC
014 B000006 8-66195
018  000000 Y
019 A000000 Y
019 B000000  289
019 C000000 BLKRKADVSR
021  000000        0
022 A000001 BLACKROCK INVESTMENTS, LLC
022 B000001 13-3806694
022 C000001   4017753
022 D000001   4323025
023 C000000    4017753
023 D000000    4323025
024  000000 N
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 N
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027  000000 Y
028 A010000    301269
028 A020000         0
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028 C010000    691597
028 C020000        54
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028 C040000    536628
028 D010000    468422
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028 D030000         0
028 D040000    436119
028 E010000    288530
028 E020000         0
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028 E040000    279502
028 F010000    259378
028 F020000         0
028 F030000         0
028 F040000    302629
028 G010000   2235245
028 G020000        54

028 G030000         0
028 G040000   2207841
028 H000000         0
029  000000 N
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048 J020000 0.000

048 K010000        0
048 K020000 0.000
055 A000000 N
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070 H020000 N
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070 J010000 N
070 J020000 N
070 K010000 Y
070 K020000 Y
070 L010000 N
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070 M010000 N
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070 N010000 N
070 N020000 N
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070 P010000 N
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070 R010000 N
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074 Y000000        0
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077 A000000 Y
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078  000000 N
080 A000000 FEDERAL INSURANCE COMPANY
080 B000000 NATL UNION FIRE UNS CO OF PITTSBURGH, PA
080 C000000    36375
081 A000000 Y

081 B000000 107
082 A000000 N
082 B000000        0
083 A000000 N
083 B000000        0
084 A000000 N
084 B000000        0
085 A000000 Y
085 B000000 N
086 A010000      0
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086 B010000      0
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086 C010000      0
086 C020000      0
086 D010000      0
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086 E010000      0
086 E020000      0
086 F010000      0
086 F020000      0
SIGNATURE   NEAL J. ANDREWS
TITLE       CFO