(a) Each airport certification specifications required by this part shall --

(1) Be typewritten and signed by the airport operator;

(2) Be in a form that is easy to revise;

(3) Have the date of initial approval or approval of the latest revision on each page or item in the specifications and include a page revision log; and

(4) Be organized in a manner helpful to the preparation, review, and approval processes.

(b) FAA Advisory Circulars in the 139 series contain standards and procedures for the development of airport certification specifications which are acceptable to the Administrator.