This paper describes the process of principal licensure reform in Iowa. Upon adoption of the ISLLC standards, the state department of education required revision of all principal preparation programs to conform to state code and guidelines developed by an external review panel. This paper analyzes the review process and compares five programs that were approved to license principals after a multi-year revision process. A content analysis of the approved programs shows that new programs were more consistent than existing programs and provided more field-based experiences that centered on student learning. Inconsistent guidelines challenged programs to make approved changes. (Contains 6 tables.)