What is the legal regulation of public relations based on?

The regulation of public relations is based on social norms. Society establishes these norms in order to regulate human behavior in society, they tell us: this is right and this is not, this is possible, but this is not possible, this is good, and this is bad. Social norms include: morality, law, religion, etiquette, fashion, etc. In addition, society imposes sanctions, they can be positive and negative, formal and informal. For example, for participating in the Olympiad you received a diploma of a prize-winner, this is a formal positive sanction, the boss reprimanded a subordinate or reduced his salary – a formal negative one. The grandmother thanked you for your help – informal positive, mother scolded – informal negative.
The most important social relations are regulated by the state with the help of legal norms.