Section 63.303 - Implementation of Subpart L(a) Compliance is based upon the arithmetic mean of the projected doses from DOE's performance assessments for the period within 1 million years after disposal, with: (1) Sections 63.311(a)(1) and 63.311(a)(2) ; and(2) Sections 63.321(b)(1) , 63.321(b)(2) , and 63.331 , if performance assessment is used to demonstrate compliance with either or both of these sections.74 FR 10829, Mar. 13, 2009