11. Any not-for-profit corporation which receives state assistance payments pursuant to this section for the acquisition of land for outdoor recreation or conservation purposes shall execute a contract with the commissioner which shall include the following:

1. (a) An agreement to make and keep the lands accessible to the public unless the not-for-profit corporation can demonstrate to the commissioner's satisfaction that public accessibility would be detrimental to the lands or any natural resources associated therewith;
2. (b) An agreement not to sell, lease, exchange or donate the lands except to the state, a local government unit or another qualifying tax exempt non-profit organization for recreation and conservation purposes consistent with this title and approved by the commissioner; and
3. (c) An agreement to execute and convey to the state at no charge a conservation easement, pursuant to title three of article forty-nine of this chapter, over the lands to be acquired with state assistance payments.

15. Notwithstanding any other provision of law, no state assistance payment under this article may be applied, with respect to any project located within the area of New York county bounded by (a) the northern boundary of Fifty-ninth street and Fifty-ninth street extended; (b) the United States pierhead line; (c) the northern boundary of the area known as Battery Park City; and (d) eight hundred feet inland easterly from the United States bulkhead line:

1. (i) for, other than for recreational use or access inland of the existing bulkhead line, any roads, bridges, ramps or parking facilities or sewers or water mains;
2. (ii) for any site improvement, including sewers, or water mains, to support residential, industrial or commercial development;
3. (iii) to excavate, place fill or plantings in, or place any piling, platform or structure, including a floating structure, in the Hudson river; or
4. (iv) to plan, evaluate or study any project involving such excavation or placement as described in subparagraph (iii) of this paragraph; and provided further that no contract, or subcontract, with a public benefit corporation, public authority, or any other person or entity, or municipality other than the city of New York shall be entered into for any state assistance payments under this article with respect to any project, or portion thereof, located in the area described in this subdivision without the affirmative approval of the community board or boards wherein the project, or portion thereof, will be located.