may install kilowatt hour submetering equipment for each individual dwelling unit to fairly allocate the cost of each individual dwelling unit's electrical consumption and charge the tenant of the dwelling unit for that consumption.
The total electric bill for a master meter, in addition to the rate per kilowatt hour, includes any sales tax, demand charges, energy component charges, and any other taxes or charges that are lawfully applied to the bill. The owner, operator, or manager of a building or buildings served by a master meter may not impose on the tenant any extra charges over and above the total electric bill for a master meter (which includes the rate per kilowatt hour and any lawful taxes or charges, but does not include a late payment charge) for a particular billing period than is charged to the owner, operator, or manager of a building or buildings served by a master meter.
IC 8-1-2-36.5