Home › CFR › Title 15 › Part 78115 CFR Part 781 — General Information and Overview of the Additional Protocol Regulations (APR)§ 781.1— Definitions of terms used in the Additional Protocol Regulations (APR).§ 781.2— Purposes of the Additional Protocol and APR.§ 781.3— Scope of the APR.§ 781.4— U.S. Government requests for information needed to satisfy the requirements of the APR or the Act.§ 781.5— Authority.