It's the other way around, Ed
State regs can be more lax than federal regs, but they can't be more stringent. A state can opt, or not, to enforce federal laws (although the feds can and do bring pressure to bear...i.e. "enforce this or we'll cut federal funding to that")...but no state "or political subdivision thereof" can enact any legislation that's more stringent than federal law. For instance, local "no discharge" zones...the state, county or municipality can't just decide to do it...federal law (40 CFR 140.4) prescribes the procedure that has to be followed, which comes down to, they have to apply to the feds (EPA) actually create the new NDZ.Otoh, although federal marine sanitation laws have been in place for more than 20 years, AL and AR still haven't succeeded in passing state legislation to enforce 'em that's within federal guidelines...so neither state has any marine sanitation laws, nor any means of enforcing the federal laws except on interstate waterways that are under USCG jurisdiction. GA and TN had to "go back to the drawing board" twice before they finally wrote state laws that didn't supercede federal marine sanitation laws...the lawyer that overturned GA's first one was a member of my YC.What a state, county or municipality CAN do is enact any legislation they want to as long as there is no federal law pertaining to it. For instance, a local ban against smoking in any public building, office building, restaurant or bar. There is no federal law that dictates where it's legal to smoke and where it isn't, so the state, county or municipality can make any rules it wants to. Private property is another matter...within limits, that is. I can't use banned pesticides on my lawn, but no local law forbidding the sale of alcohol can prevent me from buying it where it is legal and consuming it in my own home. Etc...