Any election held prior to the effective date of this act for the approval of the issuance of general obligation bonds of Attica hospital district no. 1 of Harper county, Kansas, in an amount not to exceed $1,300,000 for the purpose of enlarging and improving the extended care unit of the district’s hospital located in Attica, Kansas, under the authority of Kan. Stat. Ann. § 80-2501, et seq., notice of which was first published 18 days prior to the election instead of 21 days prior to the election is hereby validated. The district is hereby authorized to issue such bonds in the amount and for the purpose approved by the voters at such election. The bonds so issued shall be legal and binding general obligations of the district.