a rule that prevents people of certain age from doing specific activities or having access to certain services

年龄限制, 年龄要求

a person or thing that does not follow a general rule or is excluded from a class or group

例外, 特例

a principle or instruction based on which a person should behave or act in a particular situation

指导方针, 准则

a rule made by the government, an authority, etc. to control or govern something within a particular area

规定, 条例

an action that one must perform because they are legally or morally forced to do so

义务, 责任

a set of rules and regulations that must be followed in a particular organization, occupation, etc.

规则手册, 章程

the quality or characteristic of being uncompromising in enforcing rules, regulations, or standards

严格性, 严厉性

an order officially put to limit contact or trade with a particular country that has not obeyed international law

经济制裁, 禁运

used for stating conditions necessary for something to happen or be available

前提是, 只要

