The Manager shall serve as the head of the Department of Inspection and Engineering, unless the Council shall create the separate position of Director of Inspection and Engineering, in which event the Director of Inspection and Engineering shall be appointed by the Manager. The Department of Inspection and Engineering shall have the supervision and control over all inspection and engineering service of the City, including but not limited to the following: building code inspections, housing code inspections, and the administration and enforcement of all ordinances, rules and regulations pertaining to zoning and the subdivision of land. The Director of Inspection and Engineering shall report directly to and be responsible to the Manager; however, he shall meet with and provide such assistance and information to the Planning Commission and Zoning, Housing and Building Appeals Board as may be requested by said commission and board. The inspection and engineering work may be performed wholly or partially by employees or agents of the Municipality or by contracts with such persons, firms, or corporations as may be deemed to be appropriate.