19 U.S.C. § 2576b
Notwithstanding section 2571 of this title, for purposes of this subpart-
The term "approval procedure" means any registration, notification, or other mandatory administrative procedure for granting permission for a good or service to be produced, marketed, or used for a stated purpose or under stated conditions.
The term "conformity assessment procedure" means any procedure used, directly or indirectly, to determine that a technical regulation or standard is fulfilled, including sampling, testing, inspection, evaluation, verification, monitoring, auditing, assurance of conformity, accreditation, registration, or approval used for such a purpose, but does not mean an approval procedure.
The term "objective" includes-
but does not include the protection of domestic production.
The term "service" means a land transportation service or a telecommunications service.
The term "standard" means-
for common and repeated use, including explanatory and other related provisions set out in a document approved by a standardizing body, with which compliance is not mandatory.
The term "standards-related measure" means a standard, technical regulation, or conformity assessment procedure.
The term "technical regulation" means-
set out in a document, including applicable administrative, explanatory, and other related provisions, with which compliance is mandatory.
The term "telecommunications service" means a service provided by means of the transmission and reception of signals by any electromagnetic means, but does not mean the cable, broadcast, or other electromagnetic distribution of radio or television programming to the public generally.
19 U.S.C. § 2576b