Make sure that you have a written policy, and that it has been issued to all employees. Also make sure that your managers and supervisors are all trained in discrimination matters, and that you have effective monitoring procedures. It is vital that all steps that are reasonably practicable - including if necessary disciplinary action against employees who engage in discriminatory activities - are taken to provide a discrimination-free environment.
Such steps should help if you ever become subject to a discrimination case. If the discrimination has been practised by your employees against your clearly-established policies, it could mean that you escape liability altogether.
