This article may not be construed as a restriction or limitation upon any powers which a county, municipality or board of education might otherwise have under any laws of this state, but shall be construed as alternative or additional. This article may not be construed as requiring an election by the voters of a county, municipality or board of education prior to the issuance of bonds hereunder by a county, municipality or board of education and may not be construed as requiring any proceeding under any law or laws, other than that which is required by this article.