3Maximum construction heightS
Ministers, when carrying out or maintaining the principal works, may not operate above the maximum construction height without the consent of the airport operator of Edinburgh Airport.
“maximum construction height” means—
for works associated with the Central Tower, 235 metres above ordnance datum (Newlyn), and
for works associated with the North Tower, the South Tower and any other part of the Forth Crossing, 225 metres above ordnance datum (Newlyn).