Nothing contained in these Regulations shall relieve the Subdivider from complying with the applicable provisions of the Zoning Code. It is the expressed intent that these Regulations and the Zoning Code be reinforceable and together foster the purposes and objectives as stated herein. In areas outside the City limits but within the City's three-mile area of jurisdiction not subject to Zoning Code regulations, the subdivider shall place upon such plat suitable restrictions comparable to those of the Zoning Code standards for similar areas in order to insure a harmonious and orderly development.