With regard to (a), air carriers may offer priority service to Executive and VIP customers or passengers who are late for their flight. No authority is required since this is a customer service provided by air carriers and no bypassing of security occurs.
Concerning (b), (c) and (d), as indicated in (a) above, this practice does not involve bypassing security, and therefore, requires no special authorities or permissions. Further questions with respect to each air carrier’s customer service policy should be directed to the airlines.