37 CFR § 1.434 - The request.
(a) The request shall be made on a standardized form (PCT Rules 3 and 4). Copies of printed Request forms are available from the United States Patent and Trademark Office. Letters requesting printed forms should be marked “Mail Stop PCT.”
(b) The Check List portion of the Request form should indicate each document accompanying the international application on filing.
(c) All information, for example, addresses, names of States and dates, shall be indicated in the Request as required by PCT Rule 4 and Administrative Instructions 110 and 201.
(d) For the purposes of the designation of the United States of America, an international application shall include:
(1) The name of the inventor; and
(2) A reference to any prior-filed national application or international application designating the United States of America, if the benefit of the filing date for the prior-filed application is to be claimed.
(e) An international application may also include in the Request a declaration of the inventors as provided for in PCT Rule 4.17(iv).