Mass. Gen. Laws ch. 171 § 8A
For the purposes of this section and sections 8B to 8F, inclusive, the terms "foreign credit union" and "out-of-state federal credit union" shall mean a credit union with its principal place of business in the state of Connecticut, Maine, New Hampshire, New York, Rhode Island or Vermont.
Any foreign credit union or out-of-state federal credit union doing business similar to any business referred to in section 2, may establish and maintain branch offices or depots in the commonwealth, if the foreign credit union or out-of-state federal credit union is expressly authorized to do so by the laws under which it is organized and operates; provided, however, that the laws of the state in which the credit union has its principal place of business expressly authorize, under conditions not more restrictive than those imposed by this chapter as determined by the commissioner, Massachusetts credit unions to establish and maintain branches and depots therein. Such foreign credit unions and out-of-state federal credit unions shall establish and maintain branches or depots in Massachusetts, in accordance with the same laws which govern such activities by Massachusetts credit unions; provided, however, that the initial branch office other than 1 established pursuant to chapter 167B, or, if more than 1, the branch deemed to be the initial office by such entities, shall be considered the main office in the commonwealth to determine the geographical limitations on the establishment of branch offices.
The commissioner of banks shall promulgate rules and regulations relative to the administration and enforcement of sections 8A to 8F, inclusive. The rules and regulations shall include procedures for accepting applications from qualifying credit unions for approval to open a branch office.
Mass. Gen. Laws ch. 171, § 8A