This rule has been amended twice since the last five-year review. No written comments were received during those rulemakings. The initial changes were proposed as a result of changes in duties of the Water Quality Board's executive secretary and the division director as a result of S.B. 21 (2012). The specific language of the rule changes were developed through an advisory committee of wastewater certification stakeholders. The results of those efforts were then approved and adopted by the Water Quality Board.