220 CMR, § 28.06
At any time after recording of a master deed for a condominium pursuant to M.G.L. c. 183A, § 2, a representative of said condominium must notify the appropriate gas or electric company in writing of all buildings or units which are part of the condominium. The burden is on the condominium to notify the company within 14 days of the recordation and to provide the company with suitable documentation of the establishment of a condominium. Later notification or delayed documentation will result in the new rate being applied as of the date of actual notification or receipt of appropriate documentation by the company. All electricity or gas provided to the common area and/or facilities of the condominium on or after the date of the recording of the master deed and timely notification and documentation of such to the company shall be charged at the rate elected under 220 CMR 28.04.
220 CMR, § 28.06