[Code of Federal Regulations] [Title 21, Volume 1] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR1312.16] [Page 151] TITLE 21-FOOD AND DRUGS CHAPTER II--DRUG ENFORCEMENT ADMINISTRATION, DEPARTMENT OF JUSTICE PART 1312_IMPORTATION AND EXPORTATION OF CONTROLLED SUBSTANCES--Table of Contents Sec. 1312.16 Cancellation of permit; expiration date. (a) A permit may be canceled after being issued, at the request of the importer, provided no shipment has been made thereunder. In the event that a permit is lost, the Administrator may, upon the production by the importer of satisfactory proof, by affidavit or otherwise, issue a duplicate permit. Nothing in this part shall affect the right, hereby reserved by the Administrator, to cancel a permit at any time for proper cause. (b) An import permit shall not be valid after the date specified therein, and in no event shall the date be subsequent to 6 months after the date the permit is issued. Any unused import permit shall be returned for cancellation by the registrant to the Drug Enforcement Administration, Drug Operations Section, Washington, DC 20537. [36 FR 7815, Apr. 24, 1971. Redesignated at 38 FR 26609, Sept. 24, 1973, and amended at 45 FR 74715, Nov. 12, 1980; 51 FR 5319, Feb. 13, 1986; 53 FR 48244, Nov. 30, 1988; 62 FR 13969, Mar. 24, 1997]