The Department of Natural Resources proposed to amend Md. Code. Regs. 08.02.19, Nuisance and Prohibited Species. The change would prohibit the use of felt-soled waders in Maryland waters in order to prevent the spread of Didymo (Rock Snot). The deadline for public comment is February 2, 2011. http://www.dsd.state.md.us/mdregister/3801.pdf pp. 24-25.