For the purpose of promoting the health, safety, morals, or general welfare of the City, the Council may by ordinance regulate the location, height, bulk and size of buildings and other structures, the size of yards, courts and other open spaces, the density of population and the uses of buildings, structures and land for trade, industry, business, residence or other purposes. Such ordinances may provide that the zoning board of adjustment may, in appropriate cases and subject to appropriate principles, standards, rules, conditions and safeguards set forth in the ordinances, make special exceptions to the terms of the zoning regulations in harmony with their general purpose and intent. Such ordinances may provide that the zoning board of adjustment may authorize variances from the strict application of the regulations in such situations and subject to such limitations as may be set forth in ordinance. All of the powers granted by Section 211.001-211.021, Local Government Code, Vernon's Texas Codes Annotated, together with existing amendments and all amendments as hereinafter may be made relating to zoning in cities, are hereby adopted and made a part of this charter.