The owner and/or developer of private or public construction subject to the requirements of this chapter must provide the city proof of installation of the required public art in accordance with this chapter prior to the issuance of a Certificate of Occupancy for the private or public construction. The required proof of installation must include a public art maintenance plan specifying how the public art will be maintained in accordance with the requirements of section 18.120. Compliance with the public art maintenance plan must be a condition of approval of the private or public construction and the public art maintenance plan must be kept on file by the Community Development Department.