Lyndon Johnson actually said...
All actions heretofore taken by the President or by his delegates in respect of the matters affected by this order and in force at the time of the issuance of this order, shall remain in effect until amended, modified, or revoked.
Context
Executive Order 11305—Authorizing the Secretary of Army and the Governor of the Canal Zone, Respectively, to Perform Certain Functions
09/11/1966