Why are NBA teams not allowed to print sponsors' names on jerseys?

Nba officials are not allowed to print the sponsor logo on the team uniform.

You can name the stadium and make billboards around the venue. Not on the uniform! !

Nba team names are relatively fixed, and names are not mixed during the period to maintain the cultural stability contained in the team names. Like cba, team names are mixed with titles. Once the sponsors change the team name, they have to change it, making people feel that the team culture seems to be changing all the time. The most important thing is that the nba is running well. He can get sponsorship through other ways of naming the stadium without advertising on the team uniform. Besides, advertising on the chest always feels like the team is under the control of the sponsor, but it is not.