1980—Pub. L. 96–593 inserted reference to nonlabor organization and provisions respecting charges to employee for use of grievance-arbitration procedure, and struck out applicability of provisions to employees of health care institutions only.

Section 4 of Pub. L. 93–360 provided that: “The amendments made by this Act [enacting this section and section 183 of this title and amending sections 152 and 158 of this title] shall become effective on the thirtieth day after its date of enactment [July 26, 1974].”