However, it was said in the Full Court that some of the substantive provisions of Div. 4 in which the term "instalment contract" appears have no operation on or with respect to a contract for the sale of a lot prior to the registration of a building units plan. That consideration led the Full Court to hold that, prior to registration of the plan, a contract for the sale of a lot was not an instalment contract. In this Court, the respondent submitted that some of the rights conferred by Div. 4 on a purchaser under an instalment contract are rights which Parliament could not have intended to be exercised by a purchaser under an executory contract for the sale of a lot prior to the registration of a building units plan. Reference was made to ss. 74, 75 and 76 of the Property Law Act which, together with s. 73, are the substantive provisions of Div. 4 that confer on a purchaser under an instalment contract a benefit or right to which he would not otherwise be entitled. Section 74 provides for a right to lodge a caveat forbidding the registration of an instrument affecting "the land the subject of the contract"; s. 75 provides for the right to require, after paying one-third of the purchase price, a conveyance with a mortgage back to the vendor to secure the balance; and s. 76 provides for the right to direct the vendor of unmortgaged land to deposit with a prescribed authority the title deed relating to the land the subject of the contract together with an appropriate instrument of transfer to be held in escrow pending discharge of the contract by performance or otherwise. If none of the provisions of Div. 4 was apt to confer a benefit or right on a purchaser under an executory contract for the sale of a lot made prior to the registration of a plan, it could be argued that the definition should be read down. McPherson J. read it down to include only an executory contract for the sale of land "in respect of which there was at the time it was entered into an existing certificate of title or deed of grant of the land agreed to be bought and sold" and the respondent seeks to maintain that construction. But there is no need to read down the definition of "instalment contract" in order to restrict the classes of purchasers to those who can take all of the benefits or exercise all of the rights conferred by the substantive provisions of Div. 4. If there be some purchasers under instalment contracts who are not included among the purchasers who can take some of those benefits or exercise some of those rights, the exclusion of those purchasers from the particular benefits or rights is effected by the substantive provision that confers them. The operation of the substantive provisions of Div. 4 is not extended by giving the definition of "instalment contract" its ordinary meaning. On the other hand, if a class of purchasers can take only some benefits or exercise only some rights, the circumstance that other benefits or rights cannot be taken or exercised is no warrant for reading down the definition to exclude them from the benefits or rights open to them.