In addition, the applicant shall post a cash bond to secure the association obligations. Such cash bond shall be in the initial amount of up to $25,000 per project, to be held by the City in a segregated fund for such project solely for such purposes, any use thereof to be subject to the prior approval of the Planning Board in each instance. Each association shall be deemed to have assented to allow the City to perform maintenance of such open space and accessory facilities, if the association fails to perform the association obligations, and shall grant the City an easement for this purpose. In such event, the City shall first provide 14 days' written notice to the association as to the inadequate performance of the association obligations, and, if the association fails to correct in a timely manner its inadequate performance, the City may perform the association obligations on its behalf, and the cost thereof may be paid from the cash bond and any interest accrued thereon. The City shall assess the association for (i) amounts so used by the City from the cash bond, and (ii) any excess above the cash bond paid or incurred by the City, in exercise of the provisions of this Subsection H(2)(c), including expenses of enforcing the association obligations. Any amounts not paid in a timely manner by the association shall constitute a lien on each of the lots within the OSRD site plan, which may be collected and enforced by the City in the same manner as real estate taxes. Each individual deed, and the deed of trust or articles of incorporation of the association, shall include provisions designed to effect these provisions. Documents creating such association shall be submitted to the Planning Board for approval, and shall thereafter be recorded.