National Labor Relations Board v. Lion Oil Co.

In this case we are called upon again to interpret § 8 (d) of the National Labor Relations Act, as amended.1 *284See Mastro Plastics Corp. v. Labor Board, 350 U. S. 270. In particular we are concerned with §8 (d)(4), which provides that a party who wishes to modify or terminate *285a collective bargaining contract must continue “in full force and effect, without resorting to strike or lockout, all the terms and conditions of the existing contract for a period of sixty days after . . . notice [of his wish to modify or terminate] is given or until the expiration date of such contract, whichever occurs…