Division 3 Definition of ATC Clearances and Information service (ACL)

The ACL service shall provide flight crews and controllers with the ability to conduct operational exchanges comprising:

• requests and reports from flight crews to air traffic controllers,

• clearances, instructions and notifications issued by air traffic controllers to flight crews.

The exchanges between airborne and ground data link systems for the execution of ACL service shall comply with:

• operating methods and time sequence diagrams specified in Sections 5.2.1.1.1 to 5.2.1.1.4 and 5.2.1.2 of the Eurocae document identified in point 11 of Annex III,

• a common subset of the message elements specified in Section 5.2.1.1.5 of the Eurocae document identified in point 11 of Annex III as appropriate to the en route operational environment,

• safety requirements specified in Section 5.2.2.3 of the Eurocae document identified in point 11 of Annex III,

• performance requirements for the en route phase specified in Section 5.2.3.2 of the Eurocae document identified in point 11 of Annex III.