9 CFR §151.6

The owner, agent, or importer who applies for a certificate of pure breeding for any animal offered for duty-free entry under this part, shall execute on ANH Form 17-338 a statement that the animal so offered for entry is the animal described in the pedigree certificate furnished to the inspector as prescribed in § 151.4. This form shall be presented to the inspector before the animal and pedigree certificate are examined as provided in § 151.7.