Street signs shall be of a type and size approved by resolution of the borough council and shall be properly installed at each street intersection. Street signs shall be placed, two per intersection, on the near right hand corner as viewed from both directions on the street which is expected to carry the greatest traffic through the intersection. Mountings shall be in accordance with the standard procedures of the borough or with requirements adopted by the borough council. Street signs shall be placed before any certificate of occupancy for houses on the subject street are issued.