Brazil national football team players have been told not to wear hats, earrings or flip-flops while playing for their country under coach Dunga.
The Brazilian footballers reportedly also can't use mobile phones or tablets at certain times, and are discouraged from engaging in religious or political discussions.
The internal code of conduct was published on Thursday in a Brazilian newspaper.
The Brazilian football confederation confirmed its existence during a news conference in which Dunga announced the squad for friendlies against Turkey and Austria in November, Sport24 reported.
The confederation's guide for good behavior already existed but was revised after Dunga took over following Brazil's disappointing performance at the home World Cup this year.
Dunga said that the code of conduct is needed to maintain good harmony in the national team.
