公司规定每天九点前必须到办公室。

Gōngsī guīdìng měitiān jiǔ diǎn qián bìxū dào bàngōngshì.

The company requires everyone to arrive at the office before nine every day.

按照规定，你先要在这里签名。

Ànzhào guīdìng, nǐ xiān yào zài zhèlǐ qiānmíng.

According to the rules, you need to sign here first.

学校规定不能在教室里吃东西。

Xuéxiào guīdìng bù néng zài jiàoshì lǐ chī dōngxi.

The school rules that eating is not allowed in the classroom.