The Airports Authority is proposing amendments to the following four sections of the Metropolitan Washington Airports Authority Regulations:   Sections 7.5 and 7.6, relating to permits and in-Terminal locations for Demonstrations and distribution of literature; Section 9.11, relating to the use of the Virginia Central Criminal Records Exchange for background checks of Airports Authority employees; and Section 10.2, relating to the enforcement process for collection of unpaid tolls on the Dulles Toll Road.