As of 1st October 2015 when the premises are occupied under a tenancy—
(i) a smoke alarm is equipped on each storey of the premises on which there is a room used wholly or partly as living accommodation;
(ii) a carbon monoxide alarm is equipped in any room of the premises which is used wholly or partly as living accommodation and contains a solid fuel burning combustion appliance; and
(iii) checks are made by or on behalf of the landlord to ensure that each prescribed alarm is in proper working order on the day the tenancy begins if it is a new tenancy.