; and (B) in accordance with the mission plan developed under section 504. (3) First 10 years During the 10-year period following the date of enactment of this Act, the Administrator may not issue an additional request for proposals or select a site for site characterization for an additional storage facility for nonpriority waste unless the Administrator has obligated funds for activities under section 306. (4) After first 10 years After the date that is 10 years after the date of enactment of this Act, the Administrator may not issue an additional request for proposals or select a site for site characterization for an additional storage facility for nonpriority waste until the Administrator has selected a site for evaluation under section 306(b)(2). (5) Storage of priority waste Nothing in this section precludes the Administrator from storing priority waste at a storage facility for nonpriority waste. 306. Repositories (a) Siting guidelines (1) Issuance Not later than 1 year after the date of enactment of this Act, the Administrator shall issue general guidelines for the consideration of candidate sites for repositories, which shall— (A) comply with the requirements of section 112(a) of the Nuclear Waste Policy Act of 1982 ( 42 U.S.C. 10132(a) ); and (B) require the Administrator to take into account the extent to which a repository would— (i) enhance the reliability and flexibility of the system for the disposal of nuclear waste