Max
When a controller has issued a descent instruction to the level that coincides with the published level that intercepts the ILS glidepath at the Final Approach Fix, or to a lower level when allocated in accordance
with the Surveillance Minimum Altitude Chart, the controller may clear the pilot for the ILS approach.
"BIGJET 347, cleared ILS approach runway 28, QNH 1011"
When a controller wishes a pilot to descend on the ILS glidepath from a level which is above the published level that intercepts the ILS glidepath at the Final Approach Fix, the controller may use the following alternative form of phraseology.
"BIGJET 347, when established on localiser
runway 28, descend on the glidepath QNH 1011"
