“Code of Conduct” which the TNC will impose on its subcontractors in the future

A large TNC, heavily involved in subcontracting its production to various low- income nations, has become the target of an adverse publicity campaign which has centered on the low labor standards of its subcontractors. Your task is to compose a “Code of Conduct” which the TNC will impose on its subcontractors in the future. What rules would you include?