The board shall not enter into and be a party to any such sale, exchange, or lease unless the following conditions have been met:
(a)
A resolution authorizing such action and prescribing the terms of the sale, exchange, or lease has been adopted by the unanimous vote of all the members elected or appointed to the board;
(b)
Such resolution has been published in a newspaper published in the district and having a general circulation there; or if there be no such newspaper, then in a newspaper having a general circulation in the district; or, if
there is no such newspaper, then in a newspaper having a general circulation in a county in which the district or any part thereof is situated. Notice shall be published no less than once a week for three weeks prior to the making of the sale, exchange, or the execution of the lease by the board.