Identification of ATS routes other than standard departure and arrival routes

(a)When ATS routes are established, a protected airspace along each ATS route and a safe spacing between adjacent ATS routes shall be provided.

(b)ATS routes shall be identified through designators.

(c)When identifying ATS routes other than standard departure and arrival routes, the designation system used shall:

(1)permit the identification of any ATS route in a simple and unique manner;

(2)avoid redundancy;

(3)be usable by both ground and airborne automation systems;

(4)permit utmost brevity in operational use; and

(5)provide for a sufficient possibility of extension to cater for any future requirements without the need for fundamental changes;

(d)Basic ATS route designators shall be assigned in accordance with the following principles:

(1)the same basic designator shall be assigned to a main trunk route throughout its entire length, irrespective of terminal control areas, States or regions traversed;

(2)where two or more trunk routes have a common segment, the segment in question shall be assigned each of the designators of the routes concerned, except where this would introduce difficulties in the provision of air traffic services (ATS), in which case, by common agreement, one designator only shall be assigned; and

(3)a basic designator assigned to one route shall not be assigned to any other route.