See Chapter 20, Code of Iowa: https://www.legis.iowa.gov/docs/code/2019/20.pdf
AFSCME agreement: https://das.iowa.gov/sites/default/files/FY19%20Bargaining/AFSCME%202019-2021%20Contract.pdf
United Faculty agreement: https://provost.uni.edu/sites/default/files/podcasts/2019-2021_master_agreement.pdf