50 CFR 20.81 : Wildlife And Fisheries (§ 1.1 To Parts 698-699) — (§ 18.1 To Parts 101-199) — United States Fish And Wildlife Service, Department Of The Interior (Continued) (§ 18.1 To Parts 101-199) — Taking, Possession, Transportation, Sale, Purchase, Barter, Exportation, And Importation Of Wildlife And Plants (Continued) (§ 18.1 To § 24.12) — Migratory Bird Hunting (§ 20.1 To § 20.155) — Migratory Bird Preservation Facilities (§ 20.81 To § 20.83) — Tagging requirement.