The State Subdivision Map Act provides in Sections 66485 and 66486 for the adoption of a local ordinance which establishes requirements and procedures for reimbursement and a requirement for entering into an agreement with the subdivider to reimburse the subdivider for that portion of the costs of such improvements equal to the difference between the amount it would have cost the subdivider to install such improvements to serve the subdivision only and the actual cost of such improvements. Such improvements include, but are not limited to, streets (access or major thoroughfare), bridges, drainage, water and sanitary sewer facilities. In regard to drainage and sanitary sewer facilities in the subdivision situation, the City must adopt a plan as designated in Section 66483 to impose a reasonable charge on property within the area benefited by such drainage or sanitary sewer facilities. In a nonsubdivision development project, the City may follow the same procedure as established for reimbursement of subdividers who have constructed improvements of the nature set forth herein. In addition, the Director of Public Works shall define the area of benefit and establish assessments as provided herein. (Ord. 1764 § 1, 1977).