(a) Effect of continuation.--If a partnership for a definite term or particular undertaking is continued, without an express agreement, after the expiration of the term or completion of the undertaking, the rights and duties of the partners remain the same as they were at the expiration or completion, so far as is consistent with a partnership at will.

(b) Presumed agreement to continue partnership.--If the partners, or those partners who habitually acted in the business during the term or undertaking, continue the business without any settlement or liquidation of the partnership, they are presumed to have agreed that the partnership will continue.