No final subdivision plan shall be approved nor shall any streets be dedicated, nor shall any lots or land be separated, auctioned, exchanged, transferred, leased or sold except upon the completion of the improvements as specified in this chapter, or the execution of an agreement and furnishing of security for the completion thereof, and upon the approval of the final plan as specified in these Subdivision Regulations.
All improvements required by these Subdivision Regulations within the incorporated area of the City and the area within not more than three miles from the City limits as shown on the Plan "Portsmouth Metropolitan Area" shall conform to the standards of design and specifications for materials and construction approved by the City Engineer.
Except as otherwise provided, the phrase "approved by the Engineer" shall mean "approved by the City Engineer".