In the event that it shall appear from the returns that the constitutionally required percentage of the voters of the district who shall have voted on any such proposition submitted hereunder at such election voted in favor of such proposition, the district shall thereupon be authorized to incur such indebtedness or obligations, enter into such contract or issue and sell such bonds of the district, as the case may be, all for the purpose or purposes and object or objects provided for in the proposition or propositions submitted hereunder and in the resolution therefor, and in the amount so provided and at a rate of interest not exceeding the rate of interest recited in such resolution. Submission of the proposition of incurring such obligation or bonded or other indebtedness at such an election shall not prevent or prohibit submission of the same or other propositions at a subsequent election.