Oregon and Illinois join Nevada, New Jersey, Texas and West Virginia, which already have similar laws — a trend that the Indoor Tanning Association says threatens to take away "very basic parenting decisions such as this."
"Is the next step to ban teens from sunbathing at public beaches and pools?" the association says in a position statement.
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Vending machines are also transforming, thanks to new federal regulations requiring them to provide calorie counts for the snacks inside.
Manufacturers say the rule will force them to cut jobs to make up the cost of reconfiguring their machines, but the Food and Drug Administration says the savings in health care costs will dwarf any economic impact on the front end.
And Obamacare kicks in for real Wednesday, as new insurance bought through health exchanges will begin covering patient treatments.
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Many more new laws will affect the residents only of the states where they were passed.
California, for instance, will become the first state to require websites to tell users how they track and share personal information Wednesday, while Oregon will begin banning employers and schools from requiring job applicants to turn over the passwords to their Twitter, Facebook and other social media accounts.
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Gourmets in Delaware won't be able to get shark fins for their shark fin soup — the demand has forced sharks into endangered species status.
In California, students will be allowed to use bathrooms and join sports teams "consistent with their gender identity" — even if that's not what it says on their birth certificates.
In Illinois, it becomes illegal for animal rights activists to use drone aircraft to monitor hunters and fishermen.
Illinois will start publishing the names of drivers who stiff tollbooths if they owe more than $1,000.
Mothers in Oregon will be finally be allowed to take their babies' placentas home with them.
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Overall, the National Conference of State Legislatures, which tracks such things, says all U.S. states, commonwealths and territories passed nearly 40,000 new laws in 2013.