Emergency locator transmitter
104.—(1)  An AOC holder must ensure that every large aeroplane is equipped with —
(a)at least one automatic ELT or a capability in accordance with regulation 105; and
(b)at least one survival ELT.
(2)  Despite paragraph (1)(b), where a large aeroplane is required to carry life rafts in accordance with regulation 108, the AOC holder must ensure that the total number of survival ELTs that the aeroplane is equipped with is a number that is equivalent to at least one survival ELT for every 4 life rafts or part thereof that the aeroplane is required to carry.
(3)  An AOC holder must ensure every emergency locator transmitter provided in accordance with paragraph (1) or (2) —
(a)operates in accordance with the requirements of Volume III of Annex 10 of the Chicago Convention; and
(b)is capable of transmitting on 121.5 MHz and 406 MHz.
(4)  An AOC holder must ensure that every emergency locator transmitter that is capable of transmitting on 406 MHz —
(a)is coded in accordance with Volume III of Annex 10 of the Chicago Convention; and
(b)is registered with the agency responsible for the maintenance of the aircraft register.