2. In a garage or other accessory building, or in the real half of a lot owned or
2. In a garage or other accessory building, or in the real half of a lot owned or occupied by the owner of the trailer (if placed so as to conform to the yard requirements of the Zoning By-Laws for main buildings in the same district), but its use for business and/or living purposes is prohibited, except that the Board of Appeals may subject to reasonable conditions and safeguards, authorize: a. The use of a trailer as a temporary office incidental to construction on or development of the premises on which located. b. The temporary use of a trailer for living purposes owner of the lot on which located for a period not exceeding three (3) months, provided that such authorization shall not be renewed or extended to exceed a total of twelve (12) months in any case.