14 C.F.R. § 377.1
As used in this part:
Authorization means any agency certificate, approval, statutory exemption or other form of permission granted pursuant to 49 U.S.C. 40102 , 41102 , 41302 , 41309 , and 41708 . Where any operating authorization creates more than one separate route, each of these shall be deemed a separate authorization for the purposes of this part.
Renewal application means any application filed in conformity with the requirements of this part which requests either a renewal or a new license and is intended to invoke the provisions of the last sentence of 5 U.S.C. 558(c) .
Route means an authorization which permits an air carrier to render unlimited regularly scheduled service between a specifically designated pair of terminal points and intermediate points, if any.
14 C.F.R. §377.1