HAL Pilot said:SWA's Operating Specifications (issued by the FAA) would state the requirements for landing. There has to be a deviation to the Ops Specs to allow SWA to land at a field without an operating tower. Then there would be other criteria such as approved weather reporting, air-to-ground communications for a runway condition report, etc.
For the non-airline types, Op Specs are issue to each air carrier. They spell out the details of how the carrier flies. The pilots must follow the Op Specs.
A4s' post furthers my confusion here, since he's saying he's done it before. HAL, I've flow into airports that aren't controled and they have major air carriers coming in. Are cases like this examples of the "other criteria" you mention?