An employer must establish and maintain a system of medical surveillance of employees if-
(a) the employer is registered as an asbestos contractor;
(b) in the opinion of an occupational medicine practitioner, after consideration of the results of the asbestos risk assessment carried out in terms of regulation 5(5)(d), it is reasonably likely that an asbestos-related disease may occur under the particular conditions of an employee's work; or
(c) an occupational medicine practitioner recommends that the relevant employee should be under medical surveillance.