Is it legal to collect minors for smoking by law enforcement agencies? where is such an article?

The police have the right to legally detain a smoking minor until his parents or other legal representatives arrive for him, because paragraph 4 of Article 20 of the Law "On protecting the health of citizens from exposure to second hand tobacco smoke and the consequences of tobacco use" states: "Minors are not allowed to consume tobacco" ...
With parents they carry out preventive measures or transfer the case to the juvenile, the teenager can be registered with the PDN. Yes, the student will not be fined, but there may be consequences such as being sent to an orphanage as a result of deprivation of parental rights and a line in the personal file about registration in the personal income tax, which will block some professional opportunities in the future. In particular, high-security universities associated with state secrets will require a police certificate.
Those who have come under the watchful eye of PDN are constantly checked for involvement in any incident in the area. Agree, it's not very pleasant when you are constantly called for checks: weren't you beating up such and such? didn't you steal? Didn't you slip away during the drug raid?

There is no article in the Criminal Code of the Russian Federation, which prohibits smoking by minors. Only if they don't smoke in public. There is already an article about this. Persons under the age of 18 cannot be sold tobacco products and alcohol, but if they were given / bought by their parents, then they can.