(1) If the sole use of a network unit is use by an electricity supply body to carry communications necessary or desirable for:
(a) managing the generation, transmission, distribution or supply of electricity; or
(b) charging for the supply of electricity;
section 42 does not apply to the unit.
(2) If:
(a) the principal use of a network unit is use by an electricity supply body to carry communications necessary or desirable for:
(i) managing the generation, transmission, distribution or supply of electricity; or
(ii) charging for the supply of electricity; and
(b) the remaining use of the unit is use by one or more carriers, or by one or more exempt network - users, to supply carriage services and/or content services;
section 42 does not apply to the unit.
(3) In this section:
"electricity supply body" means an authority, or a body corporate, that carries on a business, or performs a function, of:
(a) generating, transmitting, distributing or supplying electricity; or
(b) managing the generation, transmission, distribution or supply of electricity.