The county board of education is hereby, in its discretion, authorized and empowered to accept donations of land and improvements thereon in the county, suitable for public school uses subject to mortgage indebtedness or indebtedness thereon not exceeding two-thirds of the value of each such donation, and to assume the payment of such indebtedness, to make extensions thereof and to pay the interest thereon as the same shall become due and payable out of any funds derived by such board from time to time from the county; provided, however, that a good and sufficient title shall be given in the corporate name of the county board of education for such land, subject only to such mortgage indebtedness; and provided further, that in case of the erection of a new building or of any addition to any such building under agreement with such board to accept a donation, as provided for in this chapter, the plans and specifications of such new building or addition to any building, so proposed to be donated, and any and all modifications thereof shall be submitted to and approved by the board; and further provided, that the interest on such indebtedness so assumed shall not exceed in any case a fair rental for the property donated; that before accepting any such donation the board shall advise the council of its purpose so to do and in writing, and the council shall have the right to consider the same ten (10) days and to forbid such acceptance if it shall be of the opinion that such indebtedness exceeds two-thirds of the value of the property donated or the interest thereon exceeds a fair rental for the property donated. (Mont. Co. Code 1965, § 21-4; 1908, ch. 229, § 1; 1912, ch. 790, § 531.)