The members of the committee (including successors and alternates), and any agent or employee appointed or employed by the committee, shall be subject to removal or suspension by the Secretary at any time. Each and every order, regulation, decision, determination or other act of the committee shall be subject to the continuing right of the Secretary to disapprove of the same at any time. Upon such disapproval, the disapproved action of the said committee shall be deemed null and void, except as to acts done in reliance thereon or in compliance therewith prior to such disapproval by the Secretary.