Snowmobilers in Iowa should probably avoid skipping their machines across the water unless they want to fork over a $100 fine.

According to the DesMoines Register, the Iowa Senate approved a bill that makes water skipping illegal. Specifically, Senate File 2331 officially makes it illegal to operate a snowmobile on any public waterway without measureable snow, except on rivers and streams between Nov. 1 and Apr. 1.

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As well, the bill requires Iowa residents to purchase a permit to ride snowmobiles in public land. The permits cost $15 annually and used to only be required for non-residents. This rule was changed at the request of the Iowa Snowmobile Association, which says the annual fees will be used for maintenance and to expand trail development.