Roddy_Piper Resident Knucklehead Vegas baby

"at or above 2300" is 2300, 2301, 2302,...,3000. so it does include an altitude below the MVA. that would be an illegal clearance. you need to ensure the aircraft is at an altitude above the MVA, MIA, MEA, etc until established on a segment of the approach.

if he's not quite to the IAF then he's not quite on a segment of the approach yet. so in that case you can't use the IAF altitude of 2300, u need to use the MVA of 3000.

as already stated, "maintain 3000 until IAF" is a clean clearance. or u could wait until your out of the MVA and issue "cross IAF at 2300" as long as the next MVA is 2300 or less.

is the obstruction the controlling obstruction for that MVA? is there a carat above the obstruction symbol? if so, there's ways to descend when you past the obstruction but still in the higher MVA box (or circle more than likely).