in subsection (a), by inserting “That no person shall be an exclusive representative of employees in such unit unless such person has been designated or selected as the exclusive representative of such employees by a majority of the voters in a secret ballot election in which not less than two-thirds of such employees vote; Provided further, ” after “employment: Provided, ”; and
Effective date— The amendments made by this Act shall apply in relation to elections occurring on or after the date that is 6 months after the date of enactment of this Act.