hordruma/ontario_laws_and_regs huggingface dataset:
33 A surveyor in establishing the rear boundary of a concession in a sectional township with double fronts shall proceed as follows: 1.  If the two concessions in a section are unbroken by a lake or river on their fronts, the surveyor shall, if intended in the original survey, join by straight lines the midway points of the side lines of the lots and their productions through the section. 2.  If the two concessions in a section are broken by a lake or river on either or both of their fronts but the fronts of the two concessions are not wholly broken at either or both ends of the section, the surveyor shall, if intended in the original survey, join by a straight line the midway points between the fronts of the two concessions on the last ascertainable side line in the section at each end of the broken front. 3.  If one of the concessions in a section is broken by a lake or river on its front at either or both ends of the section but not broken through the entire section, the surveyor shall join by a straight line a point on the broken side line of the section determined by measuring the distance shown on the original plan and field notes from the unbroken front and the midway point between the fronts of the two concessions on the last ascertainable side line in the section at the end of the broken front. 4.  If one of the concessions in a section is wholly broken by a lake or river on its front, the surveyor shall measure the distance shown on the original plan and field notes along the side lines of the lots from the front of the unbroken concession. 5.  If one of the concessions in a section is partly or wholly broken by a lake or river on its front and at either or both ends of the section and the other concession in the section is partly or wholly broken by a lake or river at either or both ends of the section and partly broken on its front, the surveyor shall establish the rear boundary of the concessions so broken on their fronts on the astronomic course intended in the original survey from a point determined by measuring the distance shown on the original plan and field notes from the unbroken part of the front of such concession along the last ascertainable side line in that concession at the end of the broken front. 6.  If both concessions in a section are wholly broken by a lake or river on their fronts and no posts were planted in the original survey to establish the rear boundaries of such concessions, the surveyor shall establish the rear boundary of such concessions on the astronomic course intended in the original survey from a point established on the limit of the section nearest the end from which the lots are numbered midway between the section corners.  R.S.O. 1990, c. S.30, s. 33.