Mzansi Workers Association ('MWA') is a trade union with members employed by both RR Manufacturers ('RRM') and SS Gas (Pty) Ltd ('SSG'). SSG supplies RRM with gas which RRM uses to manufacture its products. After members of MWA employed by SSG heard that members of MWA employed by RRM are on strike due to a dispute relating to their shift system, they also decide to go on strike to support employees of RRM who are on strike. Discuss the nature of the strike which employees of SSG want to engage in and the requirements which should be met for the strike to be protected