2. Establish and maintain such depreciation and other reserves, surplus and other accounts as the supervising agency may reasonably require, including a yearly reserve with respect to each parcel of real property held by the redevelopment corporation against the increase in local taxes after the expiration of the maximum exemption period, which shall be equal to twenty per centum of the difference between the maximum local tax on the real property of the redevelopment corporation and the local tax which would have been payable except for the tax exemption period provided for in section two hundred eleven of this article. Any provision of the general corporation law or the stock corporation law to the contrary notwithstanding, one member of the board of directors of a redevelopment corporation may be a designee of the supervising agency, as long as any of the real property of the redevelopment corporation is entitled to the tax exemption provided for in section two hundred eleven of this article.