As stipulated in Section 20 of the MEIBC Consolidated Main Agreement no employer shall utilise the services of workers within the meaning of Section 198 of the Labour Relations Act unless the temporary employment service provides proof to the employer of compliance with the following criteria, view the TESD website. The TES and the client will be held jointly and severally liable if the TES contravenes a collective agreement such as the Main Agreement or a binding arbitration award that regulates terms and conditions of employment