Any bank or trust company is permitted to invest in a partnership, limited partnership, or joint venture formed pursuant to section 3937(a) or 3937(c) of title 42, U.S.C.A., for the purpose of undertaking, assisting in or otherwise concerned with projects designated by the Battery Park City Authority, a New York public benefit corporation, in connection with the development of Battery Park City; provided, however, that the total cost of investments made under this section shall not exceed two percent of the investing bank's or trust company's capital stock and surplus.