Negotiating union recognition rules set membership thresholds and council formation for collective bargaining in industrial establishments. Where a single registered trade union exists the employer shall, subject to prescribed criteria, recognise it as the sole negotiating union. If one union has fifty-one per cent or more verified muster-roll support it shall be recognised as sole negotiating union. If no union attains fifty-one per cent, the employer shall constitute a negotiating council of unions with not less than twenty per cent verified support, allocating one representative per twenty per cent and apportioning representation for any remainder.