25 C.F.R. § 304.7 Eligibility of silver meeting standards.
Title 25 - Indians
In addition to silver currently made in compliance with the standards of the Indian Arts and Crafts Board, other silver products made prior to the promulgation of the regulations in this part may be stamped, provided the maker thereof is known to be an Indian, and the product satisfies the requirements in §304.4.
Title 25: Indians
PART 304—NAVAJO, PUEBLO, AND HOPI SILVER, USE OF GOVERNMENT MARK
§ 304.7 Eligibility of silver meeting standards.