Wes Wood responds that:
this article, or "paper" looks like "writing to publish-or-perish,"  looking for a subject "not much written about."

The "Only" in "Only Seven States" is propaganda plain and simple to lead you to think the other states are negligent and need to get on the ball. Nothing could be farther from the truth.

It is a waste of taxpayer money to oversee tattoo, when all it needs is monitoring to see that there is no public health problem. It would save millions of dollars all across the country.

"Such instructions can prevent skin infections after a person gets inked, according to the paper, published online today (Nov. 4) in the Journal of the American Medical Association (JAMA) Dermatology.

[Little do either know} "Aftercare" instructions provided are wrong all over the place. Yes. Admittedly some artists do not know "best" practices but neither does 'public-health-approved aftercare instructions."
Artist have traditionally relied on hand-me-down methods based on "the tattoo healed applying my technique" or they adopt local health dept incorrect instructions which they copied from elsewhere. 

https://www.huffpost.com/entry/better-instructions-for-tattoo-care-could-prevent-infections-doctors-say_n_563d36b6e4b0411d307134fe?guccounter=1

It is to other states' credit that they do not provide wrong information about healing tattoos, i.e. inadequate, incorrect and wrong medical advice.

Unimax has been publishing healing descriptions since 1994, well documented in the medical literature on how to heal superficial tattooing surface wounding. Many instructions we have seen are "voodoo" because authors think that something is different about wounds made by tattooing, that they do not follow medically proven healing staging. Those authors suspend their own knowledge and assume tattooists know better - they don't.

Tattoos heal in spite of what anyone recommends not because of those "special" instructions.