The articles of a limited dividend housing corporation shall contain a declaration (a) that the corporation has been organized to serve a public purpose and that it shall remain at all times subject to the supervision and control of the director or of other appropriate state authority, (b) that all real estate acquired by it and all structures erected by it shall be deemed to be acquired for the purpose of promoting the public health and safety and subject to the provisions of the State Housing Law and (c) that the stockholders of the corporation shall be deemed, when they subscribe to and receive the stock thereof, to have agreed that they shall at no time receive or accept from the company, in repayment of their investment in its stock, any sums in excess of the par value of the stock, together with cumulative dividends at the rate of six percent per annum and that any surplus in excess of such amount if the company shall be dissolved, shall revert to the State.