(a) Any application may be amended or dismissed without prejudice upon request of the applicant. Each amendment to or request for dismissal of an application shall be signed, authenticated, and submitted in the same manner as required for the original application. All subsequent correspondence or other material that the applicant desires to have incorporated as a part of an application already filed shall be submitted in the form of an amendment to the application.

(b) Defective applications, as defined in § 5.65, are subject to dismissal without prejudice.