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278

BLOCK LEVELS

On request from the pilot, a flightmay be cleared tooperatewithin controlled

airspacewithin a block level provided that other aircraft are not denied the

useof that airspace containedwithin that Block. Aglider or balloon cleared to

operate in controlled airspacewill be assignedblock levels.

Thepilot shall have complete freedom to change levelswithin the block,

provided that the upper and lower levels arenot exceeded. However, a

clearance to operatewithin a block level shall be cancelled or amended if

another aircraft requests the use of a level within the block.

When cancelling or amending a block level clearance, the aircraft operating

in a block level shall be instructed to climbor descend to an appropriate level

or block level in order to provide vertical separation from the other aircraft

requestingone of the levels. Aircraft at standard flight levelswill be afforded

priority over aircraft using non-standard flight levels.

enroute

3 – control l ed a i rspace