4. Functions conferred on a local highway authority as highway authority for a highway or as bridge authority for a bridge by or under the following provisions of the 1991 Act:
(a)section 83 (works for road purposes likely to affect apparatus in the street);
(b)section 84(1), (3) and (4) (undertaker and bridge or highway authority to take steps where apparatus affected by major works and requirement to pay compensation in certain circumstances);
(c)section 85(1) and (3) of the 1991 Act (highway and bridge authority to bear allowable costs of necessary measures where undertaker’s apparatus affected by major highway or bridge works and right to recover undertaker’s costs from third parties); and
(d)section 88(4) and (5) (consultation with bridge authority prior to execution of certain works, provision of reasonable facilities for bridge authority to monitor works, and compliance with directions of bridge authority).