PUTCO Limited, a bus operator, participated in industry-wide wage negotiations at the South African Road Passenger Bargaining Council. In April 2013, wage negotiations deadlocked and majority unions (SATAWU and TOWU) issued strike notices. TAWUSA, a minority union representing about 26% of PUTCO’s employees, was no longer a member of the Bargaining Council and expressly informed PUTCO that its members would not participate in the strike. PUTCO nevertheless issued a notice purporting to lock out all employees, including TAWUSA members, in support of its wage proposals at the Bargaining Council. TAWUSA contended that it was not party to the dispute giving rise to the strike and that no demand had been made to it, rendering the lock-out unlawful.