See Chapter 20, Code of Iowa: https://www.legis.iowa.gov/docs/code/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/uni_united_faculty_and_bor_ma_21-23_-_signed.pdf