(2) Subsection (1) of this section does not allow a property owner to cancel a contract:
(a) If both parties agree that work is to begin before the cancellation period has expired;
(b) After a contractor substantially begins the residential construction, improvement or repair; or
(c) When an initial contract is being modified after expiration of the initial cancellation period. [2007 c.648 §8; 2009 c.409 §2]