Ltd. et al. v. Letain in 1963 Supreme Court of Canada. Option Conwest Exploration Co. Ltd. has been promised an extension of time for the Letain Option to draw up the internal agreement for incorporation. With the option holder's free promise, the option holder continued on its path towards incorporation. Subsequently, the option was told to return to the original date stated in the contract, then requested relief on grounds of fairness. (Marston, 2008, pp.92-93) Accordingly, “The court held that it would be inequitable to revert to the restrictive interpretation of the contract and thus prevent the optionee from enforcing the date specified in the contract.” (Marston, 2008, pp.92-93) , 2008, pp.92-93). Likewise, in the second case, the contractor will be refused to enforce the conditions of the contract and therefore will not be able to terminate the contract as