For common water systems, there shall be an agreement among the parties served by the system to the approval of the Marin County Health Officer, describing their legal responsibility with respect to the maintenance, care and construction and operation of the system. The agreement, which shall be recorded against the deeds of the various lots, shall specifically designate the lots and their rights to take water including their rights to a proportionate share. The agreement shall also designate the obligations of the various lot owners to share the cost associated with the construction and/or operation of the system, and the manner of insuring continuous maintenance including the method for guaranteeing a party responsible for its maintenance. The purpose of this agreement is to protect the public health and safety by insuring that the common water system will not fall in disrepair, and will be maintained in accordance with the requirements of this chapter by designating those parties responsible to insure that the water system will comply with the requirements of this chapter. (Ord. 803 § 1 (part), 1990)