Exemption from budgetary level reduction

(a) In general Consistent with subsection (b)— (1) any unauthorized program that causes a budgetary level reduction applicable to a fiscal year under section 3 that is expressly reauthorized during the fiscal year in which such level is established shall not be subject to the requirements of this Act; and (2) upon the date of such reauthorization, any such reduction shall be restored. (b) Limitation Subsection (a) shall only apply if the reauthorization contains a sunset provision applicable to such program providing for an authorization of appropriations period of not more than three years.