Any person authorized to import or export natural gas has a continuing obligation to give the Assistant Secretary written notification, as soon as practicable, of any prospective or actual changes to the information submitted during the application process upon which the authorization was based, including, but not limited to, changes to: The parties involved in the import or export arrangement, the terms and conditions of any applicable contracts, the place of entry or exit, the transporters, the volumes accepted or offered, or the import or export price. Any notification filed under this section shall contain the FE docket number(s) to which it relates. Compliance with this section does not relieve an importer or exporter from responsibility to file the appropriate application to amend a previous import or export authorization under this part whenever such changes are contrary to or otherwise not permitted by the existing authorization.