Mass. Gen. Laws ch. 161, § 4
The agreement of association shall state:
(i) The names and residences of at least five persons, who shall be subscribers to the agreement of association, to act as directors until others are qualified in their stead.
Each associate shall subscribe to the agreement of association his name, residence, post office address, and the number of shares of stock which he agrees to take; but no subscriber shall be bound to pay more than ten per cent of the amount of his subscription unless a company is incorporated.