In this part:
"alternative network boundary" means a boundary that—
(a) is allowed for under a technical code; and
(b) is made by agreement between a regulated utility and another person; and
(c) if made, applies instead of the network boundary under section 53 (1).
"infrastructure" means the following:
(a) in relation to an electricity network—
(i) powerlines and cables; and
(ii) substations and equipment for monitoring, distributing, converting, transforming or controlling electricity; and
(iii) a structure supporting overhead powerlines and cables; and
(iv) wires, ducts or pipes for wires or equipment; and
(v) communication equipment for the management of the network; and
(vi) any other thing ancillary to any other part of the infrastructure;
(b) in relation to a gas network—
(i) pipelines; and
(ii) meters; and
(iii) any equipment (including pressure control devices, excess flow valves, control valves, actuators, electrical equipment, telemetry equipment, cathodic protection installations, compounds, pits, buildings, signs and fences); and
(iv) any other thing ancillary to any other part of the infrastructure;
(c) in relation to a water network—
(i) water storages, mains and treatment plants; and
(ii) pumps, facilities and equipment for distributing water, or monitoring or controlling the distribution of water; and
(iii) pipes or equipment; and
(iv) any other thing ancillary to any other part of the infrastructure;
(d) in relation to a sewerage network—
(i) sewage storages, trunk sewers, mains and treatment plants; and
(ii) pumps, facilities and equipment for conveying sewage, or monitoring or controlling the conveyance of sewage; and
(iii) pipes or equipment; and
(iv) any other thing ancillary to any other part of the infrastructure.
"isolated infrastructure "means infrastructure that—
(a) is connected to a network, but because of an alternative network boundary, is excluded from the network; and
(b) has a connection point to premises; and
(c) supplies electricity, gas, water or sewerage to the connection point of the premises.