The amount of funds authorized under a Federal award that the non-Federal entity has not obligated. The amount is computed by subtracting the cumulative amount of the non-Federal entity's unliqui [..]

Pursuant to 49 CFR 18.3 [Title 49 – Transportation; Subtitle A -- Office of the Secretary of Transportation; Part 18 -- Uniform Administrative Requirements for Grants and Cooperative Agreements to Sta [..]

The portion of obligation authority (including new budget authority and balances of unobligated budget authority carried over from prior years) that has not yet been obligated. With regard to the federal-aid highway program, the term generally refers to balances of apportioned contract authority that the states have been unable to obligate due to a [..]

The portion of federal budget authority not designated as payment for specific products or services. In one-year accounts, the unobligated balance expires at the end of the fiscal year it was made available. In multiyear accounts, it remains available for obligation for the specified number of years.

The portion of budget authority that has not yet been obligated. The unobligated balance for unexpired accounts is still available for new obligations. The unobligated balance for expired accounts is [..]