(i) Direct metering. Where the conversion is to direct metering of electricity, with the tenant purchasing electricity directly from a utility, such schedule of rent reductions is based on the median monthly cost of electricity to tenants derived from data from the United States Census Bureau's 2002 New York City Housing and Vacancy Survey, as tabulated by the New York City Rent Guidelines Board, 51 Chambers Street, Suite 202, New York, NY, and available on its website at www.housingnyc.com. The charge for electricity is not part of the legal regulated rent and is not subject to this Code. The resolution of any dispute arising from the billing or collection of such charge is not within the jurisdiction of the DHCR. A conversion to direct metering is required to include rewiring the building unless the owner can establish that rewiring is unnecessary.