The Environmental Protection Commission readopted, with amendments, regulations governing compliance, excess emissions, and measurement of emissions. The readoption revises and consolidates Chapters 21, 24, 25, 26, and 29 into a new Chapter 21, while also introducing a new Chapter 24 that includes updated provisions for air operating permits. See https://www.legis.iowa.gov/docs/aco/bulletin/05-15-2024.pdf (pp. 9368-79).