A bill to amend title 31 of the United States Code to restrict the use of appropriations amounts available for definite periods.

Amends Federal law to restrict the use of appropriations amounts available for definite periods (M accounts) to the period specified in law, plus the two-year expiration period. Requires retention of M accounts as necessary to pay severance pay, contract incentive awards, and contingent liabilities as a result of lawsuits. Repeals the authority of any Federal agency to withdraw amounts from merged surplus accounts in certain circumstances.