Side Yard Requirements of a Corner Lot. The side street setback line of any corner lot plotted on the Town's tax maps as the lot existed at the time of adoption of this chapter or any corner lot shown on any subdivision plat which received final approval prior to the adoption of this chapter shall not be less than 1/2 of the depth of the minimum front yard required on any adjoining lot; however, a lot delineated by subdivision after the adoption of this chapter shall provide a side street setback line which shall not be less than the minimum front yard required on any adjoining lot fronting on a side street.