Where respiratory protective equipment is provided, the employer must ensure that-
(a) the relevant safety equipment is capable of preventing the exposure to the HBA concerned;
(b) the relevant safety equipment is correctly selected, fitted and properly used;
(c) information, instructions, training and supervision which would be necessary with regard to the use and disposal of the safety equipment are known to the employees; and
(d) the reusable safety equipment is kept in hygienic condition and efficient working order.