117.3. A by-law which includes a provision enacted under section 117.1 must establish rules for calculating the area of the land to be transferred or the amount to be paid.
The by-law may, for that purpose, define classes of lands according to the uses for which the sites and immovables found thereon may be intended, or according to their area, or according to both such criteria, delimit parts of the territory to which the provision applies or form combinations based on a class of land and part of a territory. The calculation rules established under the first paragraph may vary according to those classes, parts or combinations.
The rules shall vary according to whether the condition prescribed is an undertaking or a payment only, or both an undertaking and a payment. The rules prescribed in the subdivision by-law must also take into account, in favour of the owner, any transfer or payment made at the time of a previous cadastral operation concerning the whole or part of the site.