9 C.F.R. § 93.807
(a) Elephants, hippopotami, rhinoceroses, and tapirs are exempt from the regulations in this part under the following circumstances:
(1) They are imported from Canada and are accompanied by a document signed by a salaried veterinarian of the Canadian Government that states:
(b) Notwithstanding other provisions in this part, the Administrator may in specific cases allow the importation and entry of elephants, hippopotami, rhinoceroses, or tapirs into the United States other than as provided for in this part under such conditions as the Administrator may prescribe to prevent the introduction of ectoparasites into the United States.
(Approved by the Office of Management and Budget under control number 0579-0020)
[52 FR 29502, Aug. 10, 1987; 52 FR 35350, Sept. 18, 1987, as amended at 57 FR 23049, June 1, 1992; 59 FR 67133, Dec. 29, 1994. Redesignated at 62 FR 56012, Oct. 28, 1997, as amended at 64 FR 23179, Apr. 30, 1999]