14 CFR § 221.131 - Form of application for waivers.
Applications for waivers shall be in the form of a letter addressed to the Office of International Aviation, Department of Transportation Washington, DC 20590, and shall:
(a) Specify (by section and paragraph) the particular regulation which the applicant desires the Department to waive.
(b) Show in detail how the proposed provisions will be shown in the tariff under authority of such waiver if granted (submitting exhibits of the proposed provision where necessary to clearly show this information).
(c) Set forth all facts and circumstances on which the applicant relies as warranting the Department's granting the authority requested. No tariff or other documents shall be filed pursuant to such application prior to the Department's granting the authority requested.