(a) The commission shall adopt rules under which an owner, operator, or manager of an apartment house or mobile home park for which electricity is not individually metered may install submetering equipment to allocate fairly the cost of the electrical consumption of each dwelling unit in the apartment house or mobile home park.
(b) In addition to other appropriate safeguards for a tenant of an apartment house or mobile home park, a rule adopted under Subsection (a) must provide that:
(1) the apartment house owner or a mobile home park owner may not charge a tenant more than the cost per kilowatt hour charged by the utility to the owner; and
(2) the apartment house owner shall maintain adequate records relating to submetering and make those records available for inspection by the tenant during reasonable business hours.

(c) A rule adopted under this section has the same effect as a rule adopted under Title 2, and a utility company and the owner, operator, or manager of an apartment house subject to this subchapter is subject to enforcement under Sections 15.021, 15.022, 15.028, 15.029, 15.030, 15.031, 15.032, and 15.033.