The special library levy (also called the 27 cent levy) is a potential source of additional funding for public libraries allowed by the Iowa Code, section 384.12 (20). It allows cities to levy an additional tax of up to $0.27 per $1,000 assessed property valuation in order to provide better library service. There is a petition and referendum required to pass the levy. The levy must be passed by a simple majority in order to be enacted. The odds of passing the special library levy are very good. Out of 9 cities that had the levy on the ballot in 2013, 6, or 66%, passed the levy.
The levy question is put on the ballot in regular city elections, held in odd numbered years. Detailed information about the special library levy is available at http://www.statelibraryofiowa.org/ld/f-h/funding-info/sp-levy