If, prior to the effective date of this amendatory Act of the 96th General Assembly, St. Joseph Ogden Community High School District 305 has levied and the county clerk has extended taxes for the purposes described in Section 17-2.11 of this Code without the certificates of the regional superintendent of schools and the State Superintendent of Education required by Section 17-2.11, then the tax levies and extensions and the expenditures by the school district of the extended amounts are hereby validated for all purposes to the same extent as if the district had received and filed the necessary certifications prior to the tax levies and extensions and had expended the funds in full compliance with Section 17-2.11.