The procedure established herein for the maintenance of street lighting, landscaping and other improvements shall be additional or alternative to any of the other procedures established by ordinance of the city or state law; provided, however that in the proceeding pursuant to this chapter only the provisions contained herein need be followed. It is understood that open space developments undertaken pursuant to this chapter shall serve to augment any other open space programs including park land dedication requirements in new subdivisions or in lieu payments therein, and shall not be considered as a substitute therefore. (Prior code § 7073.2)