The  provisions of this section shall not become effective until 90 days after the final regulations implementing this section are published in the Federal Register. The provisions of this section shall not apply to any matter, or image therein, produced, in whole or in part, prior to the effective date of this section.
18 U.S. Code § 2257A. Record keeping requirements for simulated sexual conduct
The date of enactment of this subsection, referred to in subsec. (f)(4)(A), means the date of enactment of Pub. L. 109–248, which was approved July 27, 2006.
Final regulations implementing this section, referred to in the undesignated subsec. preceding subsec. (k), were published in the Federal Register on Dec. 18, 2008, see 73 F.R. 77432.
 So in original. Probably should be “that”.
 So in original.
 So in original. Probably should be “(j) The”.