If United States Public Law 94-566, as enacted by the Congress of the United States or the federal acts it amends, should be adjudged unconstitutional or invalid in its or their application or stayed pendente lite as to state or local employees by a court of competent jurisdiction, then the coverage of those employees under this act is automatically stayed or repealed to the extent of the adjudged unconstitutionality, invalidity or inapplicability. The repeal shall be effective from the date of final disposition upon appeal or from the date of expiration of the right of appeal and shall apply to relevant matters pending at that time. If United States Public Law 94-566, as enacted by the Congress of the United States or those provisions thereof relating to coverage of state and local employees, should at any time be repealed by the Congress of the United States, then the provisions of this chapter relating to coverage of state and local employees shall be automatically repealed and of no further force and effect.