(a) In the event the committee at any time finds that, by reason of changed conditions, any regulations issued pursuant to § 929.52 should be modified, suspended, or terminated, it shall so recommend to the Secretary.

(b) Whenever the Secretary finds, from the recommendations and information submitted by the committee or from other available information, that a regulation should be modified, suspended, or terminated in order to effectuate the declared policy of the act, he shall modify, suspend, or terminate such regulation: Provided, That no such modification shall increase the restricted percentage previously established for the then current fiscal year. If the Secretary finds that a regulation obstructs or does not tend to effectuate the declared policy of the act, he shall suspend or terminate such regulation.