37 C.F.R. § 1.433 Physical requirements of international application.
Title 37 - Patents, Trademarks, and Copyrights
(a) The international application and each of the documents that may be referred to in the check list of the Request (PCT Rule 3.3(a)(ii)) shall be filed in one copy only. (b) All sheets of the international application must be on A4 size paper (21.0×29.7 cm.). (c) Other physical requirements for international applications are set forth in PCT Rule 11 and sections 201–207 of the Administrative Instructions.
Title 37: Patents, Trademarks, and Copyrights
PART 1—RULES OF PRACTICE IN PATENT CASES
Subpart C—International Processing Provisions
The International Application
§ 1.433 Physical requirements of international application.
