Requires that private-sector union representation elections be held by secret ballot administered by the National Labor Relations Board and tightens when those elections may be postponed or blocked. It limits pre-election challenges by imposing a 60-day time limit for courts to impound ballots in contesting charges, restricts the Board’s ability to delay elections (including after successor-employer changes), and treats certain inter-union “no‑raid” agreements as unfair labor practices.