The Betting, Gaming, Lotteries and Amusements (Northern Ireland) Order 1985

2.  The person, whether the occupier of the licensed track or a person authorised in that behalf in writing by that occupier, by whom the totalisator is operated (in this Schedule referred to as “the operator”) shall take all such steps as are necessary to secure that, so long as the totalisator is in use, it is in proper working order and is properly operated.N.I.