I agree with flyhardmo here,
The "special training" pilots receive to operate at these high elevation airports is usually just for the company, in case an incident would happen and insurance needs a proof that the pilot was in fact "capable" of flying and managing the plane at this given airport.
In an emergency, as soon as the airport is suitable for you to land and save the aircraft and everyone on board, just go for it. By emergency i mean critical condition of course.
If not critical just choose what suits you most, and just that. Never think that because you didn't receive this company check for this given airport you are not allowed to land on it. Suitable, go, not suitable, next option.
Cheers
