Regulation No. 20 - Crawford county
- Section R. 281.720.1 - Lake Margrethe, channel in Harbor Beach subdivision; speed restriction
- Section R. 281.720.7 - Shupac lake; high-speed boating and water skiing prohibited
- Section R. 281.720.8 - Bradford lake; hours for high-speed boating and water skiing
- Section R. 281.720.9 - Section One lake; water skiing and high-speed boating prohibited
- Section R. 281.720.10 - Bluegill lake; slow-no wake speed
- Section R. 281.720.11 - Horseshoe lake; slow-no wake speed
- Section R. 281.720.12 - Big K