(1)  The safety case in respect of a facility is to specify communications systems –

(a) within the facility; and

(b) between the facility and –

(i) appropriate onshore installations; and

(ii) appropriate vessels and aircraft; and

(iii) other appropriate facilities –

that, in the event of an emergency in connection with the facility, is adequate for those kinds of communication.

(2)  In particular, the safety case is to provide for the communications systems of the facility to be –

(a) adequate to handle –

(i) a likely emergency on or relating to the facility; and

(ii) the operation requirements of the facility; and

(b) protected so as to be capable of operation in an emergency to the extent specified by the formal safety assessment relating to the facility.