121 First, there was a question of whether the contract was void for uncertainty. Second, in the event of it being held that the contract was sufficiently certain, an issue arises as to the proper construction of cl 3.3.2 of the Special Conditions and as to whether the six month period referred to in cl 13.3(a)(1) of the General Conditions was extended to 21 months after the contract date. Third, if a ruling was made in respect to the construction issue that the six month period had not been extended as alleged by the plaintiff, it was necessary to determine whether the plaintiff had made out a case for rectification of the contract. Fourth, there was an 'election and waiver issue' as to whether the defendants, irrespective of any entitlement to terminate the contract, were bound to perform the contract. There was also a further, and more general issue, as to whether the plaintiff was in equity entitled to obtain the relief claimed.