The Public School Lease Purchase Act shall be deemed to provide an additional and alternative method for acquiring buildings and other real property authorized thereby and shall be regarded as supplemental and additional to powers conferred by other laws and shall not be regarded as a derogation of any powers now existing. The Public School Lease Purchase Act shall be deemed to provide complete authority for acquiring buildings and other real property and entering into lease purchase arrangements contemplated thereby, and no other approval of any state agency or officer, except as provided therein, shall be required with respect to any lease purchase arrangements, and the governing body acting thereunder need not comply with the requirements of any other law applicable to the issuance of debt by school districts.