1. In this Order, “accessory”, when used to describe a use, building or structure, means a use, building or structure normally incidental or subordinate to the principal use, building or structure located on the same lot and includes the erection of permanent dwellings and other auxiliary buildings necessary for the operation of the principal use; “agriculture use” means a use of land, buildings or structures for the purpose of forestry, field crops, fruit farming, market gardening, dairying, animal husbandry, poultry or bee-keeping and such uses as are customarily and normally related to agriculture, but shall not include, (a) commercial mushroom farms, (b) commercial riding establishments, (c) commercial greenhouses, or (d) kennels that are not part of a veterinarian establishment; “dwelling” means one or more habitable rooms designed for use by, and occupied by not more than one household and in which separate kitchen and sanitary facilities are provided for the exclusive use of the household, with a private entrance from outside the building or from a common hallway or stairway inside the building; “floor area” means the total area of all floors contained within the outside walls of a building, excluding in the case of a dwelling, the floor area of a private garage, porch, veranda, unfinished attic, basement or cellar; “frontage” means the width of a lot measured along a line 25 feet back from the street and parallel to the lot line abutting the street; “front yard” means a yard extending across the full width of a lot on which a building is situate, and extending from the front lot line to the main wall of the building for which such front yard is required that is nearest to the front lot line; “home occupation” means any occupation for gain or support conducted entirely within a dwelling by members of the household residing in the dwelling, provided that, (a) there is no external display or advertising other than a sign having a total display area not exceeding 2 square feet, (b) there is no external storage of goods or materials, and not more than 25 per cent of the total floor area is used for the home occupation use, and (c) there are no persons employed in the dwelling except, (A) the members of the household residing in the dwelling, or (B) in the case of a dentist, physician or veterinarian, a staff of one person; “household” means one or more persons living as a single housekeeping unit in one dwelling; “lot” means a parcel of land, described in a deed or other document legally capable of conveying land, or shown as a lot or block on a registered plan of subdivision or part thereof, and includes any parts of such parcel that are within a right of way or easement; “rear yard” means a yard extending across the full width of a lot on which a building is situate, and extending from the rear lot line to the main wall of the building for which such rear yard is required that is nearest to the rear lot line; “side yard” means a yard extending from the front yard to the rear yard and from the side lot line to the main wall of the building for which such side yard is required that is nearest to the side lot line; “single dwelling” means a separate building containing only one dwelling; “street” means a public highway that is a principal means of access to abutting lots, that is under jurisdiction of the Province of Ontario or The Regional Municipality of York or the Town of Markham, or is a road within a registered plan of subdivision, or is a road the maintenance of which has been assumed by the town; “yard” means a space open from the ground to the sky on the lot on which a building is situate unoccupied except for such accessory buildings as are permitted in this Order.  O. Reg. 104/72, s. 1; O. Reg. 360/72, s. 1; O. Reg. 492/90, s. 1. Application