(a) Building Lines. Where the subdivided area is not under zoning control and is to be used for residential purposes, the average front building line shall not be less than twenty-five feet from the right of way of the street or thoroughfare upon which the lots front.
Restrictions requiring greater setbacks than the above may be required for commercial and industrial uses, and for residential uses along major highways as determined by the Commission.
(b) Easements. Easements of at least six feet in width shall be provided on each side of all rear lot lines and along side lot lines where reasonably necessary for poles, wires, conduits and gas mains. Easements may also be required along or across lots where engineering design or special conditions may necessitate the installation of water and sewer lines outside public rights of way. For lots facing on curvilinear streets the rear easement should consist of straight lines with a minimum number of points of deflection.