Although the degree of flood protection required by this Ordinance is considered reasonable for regulatory purposes, larger floods may occur on rare occasions or flood heights may be increased by man-made or natural causes. These regulations do not imply that the various types of flood plain areas or land uses permitted within such areas will be free from flooding or flood damage. These regulations shall not create liability on the part of the St. Charles Parish Council, St. Charles Parish Planning and Zoning Department, nor any officer or employee thereof for any flood damages that result from reliance on this Ordinance or any administrative decision lawfully made thereunder. In no case shall responsibility or liability arise from the design or operation of subdivision drainage facilities dedicated to the parish if the St. Charles Parish Council has not accepted, in writing, the dedication and agreed to maintain and operate the facilities.