Mass. Gen. Laws ch. 108A, § 23: Continuation of partnership beyond time fixed for termination

Section 23. (1) When a partnership for a fixed term or particular undertaking is continued after the termination of such term or particular undertaking without any express agreement, the rights and duties of the partners remain the same as they were at such termination, so far as is consistent with a partnership at will.

(2) A continuation of the business by the partners or such of them as habitually acted therein during the term, without any settlement or liquidation of the partnership affairs, is prima facie evidence of a continuation of the partnership.