By federation rules, all sponsors must remain anonymous for their own protection.

根据协会的规章，为了避免麻烦，所有资助人必须隐名。

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Only at the national level - say, team USA, team England - where different rules imposed by the Federation Internationale DE Football Associations (FIFA) apply.

只有在国家层面上来讲才可能——国际足联对美国队、英格兰队采用了不同的规则。

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An international federation must govern the sport by enforcing rules and making sure athletes meet Olympic standards.

国际联盟必须加入管理并执行各项规则（条例）使运动员们能达到奥委会所规定的标准。

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The bats have changed dramatically, with the pimpled side, used to return an opponent's spin with venom, reduced drastically by International Table Tennis Federation rules.

BBC: Table tennis plays by the rules

Food safety is increasingly in the news, but many people are ignorant about the basic rules of hygiene, according to a survey by the Food and Drink Federation, and these could make the difference between relaxing after a good meal and being up all night with food poisoning.

BBC: Eating safe