(1) "Small customer" means a residential customer or a small electricity or natural gas commercial customer of a distribution utility.

(2) "Residential customer" means a residential customer of a distribution utility.

(3) "Small electricity commercial customer" means a commercial electricity customer whose individual account averaged a monthly demand in the previous calendar year of less than 300 kilowatts (kW) or a new commercial customer whose individual account is estimated to average a monthly demand of less than 300 kW.

(4) "Small natural gas commercial customer" means a commercial natural gas customer with usage per year on an individual account which averages under 500 dekatherm units (dkts) or 500 mcf (each mcf unit is one-thousand cubic feet) or a new commercial customer whose individual account is estimated to average a monthly usage under 500 dkts or mcf per year.