He left his post without authorization.

他擅自离开了工作岗位。

Please do not modify the files without authorization.

请不要擅自修改文件。

You cannot enter this area without authorization.

你不能擅自进入这个区域。

He decided the meeting time without authorization.

他擅自决定了会议的时间。

She used the company's resources without authorization.

她擅自使用了公司的资源。

To pledge foreign exchange in lien without authorization;

擅自以外汇作质押的；

Those who import or export psychotropic drugs without authorization.

(五)未经批准擅自进口、出口精神药品的.

No power supply enterprise may change the price of electricity without authorization.

供电企业不得擅自变更电价.

A taxpayer destroys accounting books without authorization or refuses to provide information on tax payment;

擅自销毁帐簿或者拒不提供纳税资料的；

Alters the structure of the leased property without authorization or uses the leased property other than for the purpose stated herein.

未得甲方同意将承租的房屋擅自拆改结构，改变用途。