25 C.F.R. § 304.4 Standards and additional requirements.
Title 25 - Indians
No piece of silver, though made in compliance with the standards set forth by the Indian Arts and Crafts Board, shall bear the Government mark unless: (a) Its weight is substantially in accord with Indian usage and custom. (b) Its design elements are substantially in accord with Indian usage and tradition. (c) Its workmanship is substantially that expected in good hand craftsmanship.
Title 25: Indians
PART 304—NAVAJO, PUEBLO, AND HOPI SILVER, USE OF GOVERNMENT MARK
§ 304.4 Standards and additional requirements.
