Existing collective bargaining units and agreements

The enactment of this Act shall not invalidate any certification, recognition, result of an election, collective bargaining agreement, or memorandum of understanding that— (1) has been issued, approved, or ratified by any public employee relations board or commission, or by any State or political subdivision or an agent or management official of such State or political subdivision; and (2) is in effect on the day before the date of enactment of this Act.