Equipment
21.—(1) Subject to paragraph (2), the operator of any vehicle which is being used for the carriage of dangerous goods shall ensure that—
(a)it is equipped so that the driver can take those measures detailed in the emergency information which he would be required to take in order to comply with regulation 22(1); and
(b)where toxic gases are being carried, the vehicle crew are provided with suitable respiratory protective equipment to enable them to escape safely in case of emergency.
(2) Paragraph (1) shall not apply in relation to any trailer which is being used for the carriage of dangerous goods where that trailer is detached from the motor vehicle.