65- 407 C.M.R. ch. 303, § 6
If an investor-owned electric utility company or one or more of its subsidiary or parent companies is party to a collective bargaining agreement recognized by federal or state law, and if as a result of retail competition any of those companies creates, acquires or merges with any other entity, that entity shall continue to recognize and bargain with the union representing the employees of the company at the time of the creation, acquisition or merger and shall refrain from making unilateral changes in the employees' terms and conditions of employment. In addition, any successor employer is bound to the terms of the collective bargaining agreement to the extent permitted by federal law. Nothing in this section prevents any company, corporation or other business from entering into any collective agreement as allowed by state or federal law.
65- 407 C.M.R. ch. 303, § 6