14 C.F.R. § 139.343 Noncomplying conditions.
Title 14 - Aeronautics and Space
Unless otherwise authorized by the Administrator, whenever the requirements of subpart D of this part cannot be met to the extent that uncorrected unsafe conditions exist on the airport, the certificate holder must limit air carrier operations to those portions of the airport not rendered unsafe by those conditions.
Title 14: Aeronautics and Space
PART 139—CERTIFICATION OF AIRPORTS
Subpart D—Operations
§ 139.343 Noncomplying conditions.