Bedtime Reading Provided by the CBO

Unauthorized Appropriations and Expiring Authorizations (Appropriations Version). There's also House and Senate versions but one should suffice. Of course, nothing is definitive about this report:

Although this report is intended to aid the Congress by identifying those authorizations of appropriations that have expired or will expire, it should not be considered definitive regarding the application of House or Senate rules. What constitutes an "unauthorized appropriation" under such rules is determined by the precedents within the House or Senate, and the applicability of those rules is determined by the respective Office of the Parliamentarian.

What's the largest unauthorized appropriation for 2005? Veterans' medical care at $27.9 billion.