(a) In the event the committee at any time finds that, by reason of changed conditions, any regulations issued pursuant to § 915.51 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 with respect to any or all shipments of avocados in order to effectuate the declared policy of the act, he shall modify, suspend, or terminate such regulation. 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. On the same basis and in like manner the Secretary may terminate any such modification or suspension.