28 C.F.R. § 75.7

(a) Any producer of any book, magazine, periodical, film, videotape, digitally- or computer-manipulated image, digital image, picture, or other matter may cause to be affixed to every copy of the matter a statement attesting that the matter is not covered by the record-keeping requirements of 18 U.S.C. 2257(a)-(c) or 18 U.S.C. 2257A(a)-(c), as applicable, and of this part if:

(1) The matter contains visual depictions of actual sexually explicit conduct made only before July 3, 1995, or was last produced, manufactured, published, duplicated, reproduced, or reissued before July 3, 1995. Where the matter consists of a compilation of separate primarily produced depictions, the entirety of the conduct depicted was produced prior to July 3, 1995, regardless of the date of secondary production;

(2) The matter contains only visual depictions of simulated sexually explicit conduct or of actual sexually explicit conduct limited to lascivious exhibition of the genitals or pubic area of any person, made before March 18, 2009;

(3) The matter contains only some combination of the visual depictions described in paragraphs (a)(1) and (a)(2) of this section.

(b) If the primary producer and the secondary producer are different entities, the primary producer may certify to the secondary producer that the visual depictions in the matter satisfy the standards under paragraphs (a)(1) through (a)(3) of this section. The secondary producer may then cause to be affixed to every copy of the matter a statement attesting that the matter is not covered by the record-keeping requirements of 18 U.S.C. 2257(a)-(c) or 18 U.S.C. 2257A(a)-(c), as applicable, and of this part.