(1) The boundary of a network must be worked out in accordance with a technical code.
(2) A technical code may deal with the boundary of a network by reference to a connection point between the network and—
(a) customers' premises; or
(b) buildings or structures on customers' premises; or
(c) any other network.
(3) If a technical code allows for an alternative network boundary to be agreed between a regulated utility and another person, the agreement may only be made if—
(a) the location and properties of any isolated infrastructure that is created by the alternative boundary is clearly identified; and
(b) the technical regulator agrees in writing to the alternative boundary.