Section 590.201 - General(a) Any person seeking authorization to import or export natural gas into or from the United States, to amend an existing import or export authorization, or seeking any other requested action, shall file an application with the FE under the provisions of this part.(b) Applications shall be filed at least ninety (90) days in advance of the proposed import or export or other requested action, unless a later date is permitted for good cause shown.54 FR 53531, Dec. 29, 1989; 55 FR 14916, Apr. 19, 1990