In the matter of the contract, the applicable law is the one of contracts, save that the SSMA overrides when it comes to the length of the term.
A contract should specify the start date, the length of the contract or a finish date and the consideration. If there is ANY ambiguity about the above then the contract could be considered invalid by a court.
It pays to have someone familiar with contract law advise when signing a strata management contract. It’s not really the realm of strata managers. They usually just put up the standard SCA contract, which in my opinion is flawed in a few areas. ( but I am not a lawyer).