RIO DE JANEIRO (AFP) - Brazil's Maracana football stadium, one of the sport's most hallowed and raucous grounds, has some new rules of etiquette: remain seated during games and please wear a shirt. Also, no musical instruments such as drums or bamboo poles to wave flags.

The code of good conduct at South America's largest stadium was devised after the home team Fluminense signed a contract to play there another 35 years, stadium officials said on Thursday.

Fences will be set up to separate fans, and not everyone likes the segregation.

"It is a shame to put up bars at Maracana to separate fans. They have to live together in harmony," said former Brazilian football star Bebeto on Twitter.