(a) Except as provided in subsection (b) of this section, every appropriation that is payable out of the general revenue, or so much thereof as may remain undrawn at the end of the year for which made, shall be deemed to have expired at the end of the year for which it is made, and no warrant shall thereafter be issued upon it: Provided, That warrants may be drawn through the 31st day of July after the end of the year for which the appropriation is made if the warrants are in payment of bills for such year and have been encumbered by the budget office prior to July first: Provided, however, That if such 31st day of July is on Saturday, then warrants may only be drawn through the Friday immediately preceding such Saturday, but if such 31st day of July is on Sunday, the warrants may be drawn through the Monday immediately following such Sunday.
(b) Notwithstanding any provision of subsection (a) of this section to the contrary:
(1) Appropriations that are payable out of the general revenue, or so much thereof as may remain undrawn at the end of the year for which made, for buildings and land or capital outlay shall remain in effect, and shall not be deemed to have expired until the end of three years after the passage of the act by which such appropriations are made; and