19 USC § 2091
List of stone carvings and wall art; promulgation and revision; criteria for classification
through Pub. L. 116-282, except Pub. L. 116-260
The Secretary, after consultation with the Secretary of State, by regulation shall promulgate, and thereafter when appropriate shall revise, a list of stone carvings and wall art which are pre-Columbian monumental or architectural sculpture or murals within the meaning of paragraph (3) of section 2095 of this title. Such stone carvings and wall art may be listed by type or other classification deemed appropriate by the Secretary.