Neither this article nor anything herein contained is or shall be construed as a restriction or limitation upon any powers that the Authority might otherwise have under any laws of the Commonwealth, and this article is cumulative to any such powers. This article does and shall be construed to provide a complete, additional, and alternative method for the doing of things authorized thereby and shall be regarded as supplemental and additional to power conferred by other laws. However, except as otherwise explicitly provided herein, the issuance of bonds, notes, and other obligations and refunding bonds under the provisions of this article need not comply with the requirements of any other law of the Commonwealth applicable to the issuance of bonds, notes, and other obligations. No proceedings, notice, or approval shall be required for the issuance of any bonds, notes, and other obligations or any instrument as security therefor, except as is provided in this article.