21 C.F.R. § 510.202
The following definitions of terms apply when used in this subpart:
CNADA means an application for conditional approval of a new animal drug submitted under section 571 of the Federal Food, Drug, and Cosmetic Act, and includes all amendments and permissible supplements.
Import tolerance means a tolerance for a residue of a new animal drug not approved or conditionally approved for use in the United States, but present in any imported edible portion of any animal.
NADA means a new animal drug application submitted under section 512 of the Federal Food, Drug, and Cosmetic Act, including all amendments and permissible supplements, for approval of a new animal drug.
Request means a request to establish or amend an import tolerance.
21 C.F.R. §510.202