Where respiratory protective equipment is provided, the employer or self-employer person shall ensure that-
(a) the relevant equipment is capable of keeping the exposure at or below the OEL for the type of lead;
(b) the relevant equipment is correctly selected and properly used;
(c) information, instruction, training and supervision that are necessary with regard to the use of the equipment are known to the persons; and
(d) the equipment is kept in good condition and efficient working order.