Order Code 98-183 GOV
Updated January 18, 2005
CRS Report for Congress
Received through the CRS Web
Senate Committees: Categories and Rules
for Committee Assignments
Judy Schneider
Specialist on the Congress
Government and Finance Division
Senate Rule XXV and party conference rules address committee assignments.
Senate Rule XXV, paragraphs 2 and 3 establish categories of committees, popularly
referred to as “A,” “B,” and “C,” that condition assignment rules.
A COMMITTEES
B COMMITTEES
C COMMITTEES
Agriculture, Nutrition and
Budget
Select Ethics
Forestry
Rules and Administration
Indian Affairs
Appropriations
Small Business and
Joint Taxation
Armed Services
Entrepreneurship
(Joint Library and Joint
Banking, Housing and
Veterans’ Affairs
Printing are not listed, but
Urban Affairs
are treated as C
Special Aging
committees for assignment
Commerce, Science and
purposes)
Transportation
Joint Economic Committee
Energy and Natural Resources
Environment and Public
Works
Finance
Foreign Relations
Health, Education, Labor, and
Pensions
Homeland Security and
Governmental Affairs
Judiciary
Select Intelligence
Congressional Research Service ˜ The Library of Congress

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CRS-2
Number of Assignments: Senate Rule XXV, paragraph 4, places restrictions on
committee membership based on these categories.
! Each Senator shall serve on two committees, and no more than two, in
Class A.
! Each Senator may serve on one committee, but no more than one, in
Class B.
! Each Senator may serve on one or more committees in Class C.
Limitations on Assignments:
! Super “A” or “Big Four” Committees: Democratic and Republican
members are prohibited from serving on more than one among the
Committees on Appropriations, Armed Services, Finance, and Foreign
Relations pursuant to party rules.
! Republican members from the same state are prohibited from serving on
the same committee by Republican Conference rule. Democrats adhere
to the same prohibition, but by tradition.
! Intelligence Committee membership should include two Members each
from the Committees on Appropriations, Armed Services, Judiciary, and
Foreign Relations.
! Chair and ranking member of the Armed Services Committee shall serve
as ex-officio non-voting members of the Intelligence Committee.
Exceptions to the rule restrictions, which are not uncommon, are recommended by
the pertinent party conference and then officially authorized through Senate approval of
a resolution affecting one or more Senators.
Limitations on Chairmanships: Republican Conference rules address limitations on
committee leadership positions for Republicans whether or not they are in the majority.
Democratic Conference rules may also address these limitations; however, their rules are
not publicly available.
! A chair/ranking member of an “A” committee may not serve as chair or
ranking member of any other committee, except the chair/ranking
member of the Finance Committee may chair the Joint Committee on
Taxation.
! A chair/ranking member of an “A” committee may not serve as
chair/ranking member of any subcommittees. Appropriations
subcommittee chairmanships are exempt.
! A chair/ranking member of a “non-A” committee may not serve as
chair/ranking member of any other committee, except the chair/ranking
member of the Rules and Administration Committee may chair the Joint
Printing or Joint Library Committee.
! A chair/ranking member of a “non-A” committee, excluding Ethics, may
not serve as chair/ranking member of more than one subcommittee.
Appropriations subcommittee chairmanships are not exempt.
! The chair/vice chair of the Ethics Committee may serve on no more than
two standing subcommittees.

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CRS-3
! A Senator may not serve as chair/ranking member of more than two
subcommittees.
! A Senator shall not serve more than six years as chair of any standing
committee, effective January 1997, plus six years as ranking member of
a committee. Once a Senator served six years chairing a committee, the
term would be over. However, if a Senator served six years as a ranking
minority member, the Senator could serve as chair if the party controls
the chamber.
Limitations on Chair and Party Leader Assignments:
! A chair or party leader may not select an “A” committee on their third
round committee selection.

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