(a) Except as provided in this section, as a PVO you must not require a passenger with a disability to provide advance notice in order to obtain services or privileges required by this Part.

(b) If 10 or more passengers with a disability seek to travel as a group, you may require 72 hours advance notice for the group's travel.

(c) With respect to providing particular auxiliary aids and services, you may request reasonable advance notice to guarantee the availability of those aids or services.

(d) Your reservation and other administrative systems must ensure that when passengers provide the advance notice that you require, consistent with this section, for services and privileges, the notice is communicated, clearly and on time, to the people responsible for providing the requested service or accommodation.