The board of directors, when authorized by majority vote of the electors voting upon a proposition, have the power:

(a)  To acquire real property by purchase at prices or amounts authorized by duly adopted proposition;

(b)  To sell, transfer or permanently dispose of any real property, on such terms and conditions and at such prices as shall by proposition be authorized;

(c)  To take any further or additional action which, under the provisions of this chapter, must first be authorized by the adoption of a proposition.