Before turning to the legislation under which it is said that this option is illegal it is desirable to examine the precise effect of the option when it was granted. It formed the third part of a transaction to be carried out under these instruments. Clearly it was intended that the grantor of the option, the vendor of the other two parcels of land, should be bound but bound only upon the contingency occurring of the municipality approving, that is sealing, the plan of subdivision. The option was as much subject to this condition or contingency as the contracts: for the option was exercisable only if the defendants completed the purchase of the middle block, and that could not be done unless the plan was sealed. The final clause of the option says that the option shall only be exercisable "provided", that is "if", the purchasers completed the purchase of what may be called the middle block; in fact it comprised two blocks as it turned out. Now the contract so to be completed clearly states that there is, at its date, no plan of subdivision, that the purchaser must admit the identity of the land sold with that comprised in the plan of survey thereinafter mentioned, and that if the municipality declines to approve the survey plan the contract shall be cancelled. It is clear therefore that the obligation of the vendor, whether under the contracts or under the option, depends entirely on the sealing of the plan. There is no point in asking whether the conditions of the contracts or one or other of them is precedent or subsequent. For plainly the purchaser under the contract for the middle block was not entitled to possession before he paid the purchase money and that meant at earliest, within seven days of the approval of the plan by the municipality. It was only then that the option could become exercisable. In other words before the option could be exercised the plan of subdivision must be sealed. The conditions were in fact all fulfilled before notice of the exercise of the option was given. Why in these circumstances should illegality form a defence to an attempt to enforce the option? The defendants answer simply that it does not matter how conditional contingent provisional or hypothetical a contract may be, upon a proper reading of the statute it makes the contract illegal if it is a contract contemplating the sale of land in subdivision and it is made before the plan of subdivision is actually sealed. Section 568 of the Local Government Act 1946 is the provision to which this intention is attributed by the defendants. It was amended by s. 26 of the Local Government (Amendment) Act 1954 (No. 5873) but the amendment is not relevant. By the Local Government Act 1957 (No. 6151) ss. 10 (c) and (d) however amendments were made expressly removing the prohibition against "sale" before the sealing of a subdivisional plan and providing for the validity of any agreement for such a sale but subject to an implication of a condition that the plan must be sealed within ninety days. The provisions of s. 568 as amended are now contained in the Local Government Act 1958, s. 569. It will be observed that the amended version, which is not retrospective and cannot therefore in any event govern this case, is concerned with the validity of an unconditional "sale" of land in subdivision before the plan of subdivision is sealed and adopts the device of implying a condition that the plan must be sealed within ninety days and, subject to that condition, of giving validity to the contract. But why should it be assumed that the provision contained in s. 568 ever extended to a contract the operation of which as a sale was by the very terms of the contract itself conditional upon the sealing of a plan of subdivision; or in other words the operation of which as a sale was suspended until the subdivision was authorized in the manner required by law? The material provisions of s. 568 admit of a comparatively brief statement although the section itself is a long one covering various aspects of laying out new streets and subdividing land. It is a section which applies to cities towns and boroughs, as well as to parts of shires if declared applicable thereto by by-law: s. 561 (1) and s. 3 (2). In the case of land to which it applies where any person intends to subdivide the land into two or more parts he must give to the municipal council written notice in a statutory form of his intention. He must also submit to the council a plan: s. 568 (1). The plan must show the allotments into which the land is to be subdivided and many other particulars as to streets, drainage, lanes, reserves, means of access, levels connexions of new streets with other streets and so on: s. 568 (2). If after due inquiry and report the council is satisfied about the various matters it may cause the plan to be sealed with the seal of the municipality: s. 568 (3) (5) (6) (7) (12) and (4). By s. 568 (9) a person is made liable to a penalty of not more than £50 if he neglects or omits to give the required notice or to submit the plan or makes or lays out a new street etc. before the plan is sealed or (and upon this the defendants place much reliance) sells conveys or transfers such land or any part thereof in allotments before such plan is sealed. The plan is to be lodged with the Registrar of Titles: s. 568 (11); cf. s. 97 of the Transfer of Land Act 1954 (No. 5842). If the council refuses consent to a plan of subdivision an appeal may be brought to a court of petty sessions: s. 569.