After the effective date of this chapter as defined in § 130-120, except for existing legal nonconforming uses or structures, no structure or building shall be erected, reconstructed, structurally altered, enlarged or moved and no structure, building, lot or land shall be used, occupied or designed to be used unless in conformance with the regulations specified herein for the zoning district in which it is located and with all other applicable provisions of this chapter and then only after apply for and securing all permits, licenses and approvals required by all laws, ordinances, resolutions and codes.