19 U.S.C. § 2091

section 2095 of this titleThe 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 . Such stone carvings and wall art may be listed by type or other classification deemed appropriate by the Secretary.