FAA Federal Aviation Regulations (FARS, 14 CFR)

(a) The prohibitions of this section shall apply from the time a proceeding is noticed for hearing unless the person responsible for the communication has knowledge that it will be noticed, in which case the prohibitions shall apply at the time of the acquisition of such knowledge.

(b) Except to the extent required for the disposition of ex parte matters as authorized by law:

(1) No interested person outside the FAA and no FAA employee participating as a party shall make or knowingly cause to be made to any decisional employee an ex parte communication relevant to the merits of the proceeding;

(2) No FAA employee shall make or knowingly cause to be made to any interested person outside the FAA an ex parte communication relevant to the merits of the proceeding; or

(3) Ex parte communications regarding solely matters of agency procedure or practice are not prohibited by this section.