Certain features of the master plan shall be realized by stages, and the need for or extent of a particular improvement will depend on the demands created by surrounding growth and ability to finance its cost. Such improvements include: pavements, culverts, bridges, storm sewers, grade separations, sanitary sewerage, water supply facilities, development of parks and playgrounds, school and other public buildings, grounds and facilities. When such improvements shall be carried out or constructed and the extent of their design (whether provided by the subdivider or developer of land or by the village or other public agency) shall be determined by the authority having such jurisdiction. All such improvements shall be made as provided by statutes and ordinances relating thereto and in accordance with approved or established standards. (1999 Code § 10.04)