GM1 Article 2(46) ATS route      

CAA ORS9 Decision No. 1

(a) The term ‘ATS route’ is used to mean variously airway, advisory route, controlled or uncontrolled route, arrival or departure route, etc.

(b) An ATS route is defined by route specifications which include an ATS route designator, the track to or from significant points (waypoints), distance between significant points, reporting requirements and, as determined by the competent authority, the lowest safe altitude.