CMTXX Cma Treasury Fund (MM)

000 A000000 09/30/2012
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   1782454
022 D000001   2115185
023 C000000    1782454
023 D000000    2115185
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    318279
028 A020000         0
028 A030000         0
028 A040000    318257
028 B010000    286669
028 B020000         0
028 B030000         0
028 B040000    571310
028 C010000    282681
028 C020000         0
028 C030000         0
028 C040000    357258
028 D010000    351042
028 D020000         0
028 D030000         0
028 D040000    229827
028 E010000    287079
028 E020000         0
028 E030000         0
028 E040000    340151
028 F010000    256704
028 F020000         0
028 F030000         0
028 F040000    298382
028 G010000   1782454
028 G020000         0

028 G030000         0
028 G040000   2115185
028 H000000         0
029  000000 N
030 A000000      0
030 B000000  0.00
030 C000000  0.00
031 A000000      0
031 B000000      0
032  000000      0
033  000000      0
034  000000 N
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036 B000000      0
037  000000 N
038  000000      0
039  000000 N
040  000000 Y
041  000000 Y
042 A000000   0
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042 C000000 100
042 D000000   0
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045  000000 N
048  000000  0.000
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048 C010000        0
048 C020000 0.000
048 D010000        0
048 D020000 0.000
048 E010000        0
048 E020000 0.000
048 F010000        0
048 F020000 0.000
048 G010000        0
048 G020000 0.000
048 H010000        0
048 H020000 0.000
048 I010000        0
048 I020000 0.000
048 J010000        0
048 J020000 0.000

048 K010000        0
048 K020000 0.000
055 A000000 N
055 B000000 N
056  000000 Y
057  000000 N
058 A000000 N
059  000000 Y
060 A000000 Y
060 B000000 Y
061  000000        0
062 A000000 N
062 B000000   0.0
062 C000000   0.0
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063 A000000   0
063 B000000  0.0
066 A000000 N
067  000000 N
068 A000000 N
068 B000000 N
069  000000 N
070 A010000 N
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N

070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 N
070 J020000 N
070 K010000 Y
070 K020000 Y
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 N
070 N020000 N
070 O010000 N
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000         0
071 B000000         0
071 C000000         0
071 D000000    0
072 A000000  6
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072 C000000        0
072 D000000        0
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072 L000000        6
072 M000000        1
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072 R000000        8
072 S000000        2
072 T000000        0
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072 W000000        6
072 X000000     2166
072 Y000000     1880
072 Z000000        0

072AA000000       44
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074 N000000  1553384
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074 U010000  1553320
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074 W000000   1.0000
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074 Y000000        0
075 A000000  1656998
075 B000000        0
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077 A000000 N
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080 C000000        0
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082 B000000        0
083 B000000        0
084 B000000        0

086 A010000      0
086 A020000      0
086 B010000      0
086 B020000      0
086 C010000      0
086 C020000      0
086 D010000      0
086 D020000      0
086 E010000      0
086 E020000      0
086 F010000      0
086 F020000      0
SIGNATURE   NEAL J. ANDREWS
TITLE       CFO