Each certificate issued under this regulation shall:

(a) Show that it was issued under the Tobacco Inspection Act;

(b) Be in a form approved for the purpose by the Director, and

(c) Embody within it, written or printed terms with respect to the particular kind of service, all applicable information required by § 29.9263. Each certificate may also contain any information, not inconsistent with the act and the regulations in this subpart, as may be approved or required by the Director. The Director may, in his discretion, specify or limit the period in which a certificate shall be valid.