Yes, it seems to be obvious that web design company must have own web site with portfolio of previous works.

诚然，这似乎是明显，网页设计公司必须有自己的网站，与以往的作品组合。

youdao

Applicants must have their own transport.

申请人必须有自己的交通工具。

《牛津词典》

You must have your own bike.

你必须有自己的自行车。

youdao

Continuing disasters in the Indian Ocean made Indonesia decide it must have a warning system of its own.

VOA: special.2009.03.17

but to make their own. The primary or fundamental movements of the new school of the dance must have within them the seeds from which will evolve all other movements, each in turn to give birth to others in an unending sequence of still higher and greater expression,thoughts,and ideas.

VOA: special.2010.08.29

However, each company must have its own validation and billing system, and each must attract enough customers to cover these costs as well.

FORBES: Magazine Article

For a prenup to be effective, both parties must have their own separate attorney.

FORBES: June Brides, Are You Ready for Divorce?

In summary, in order for a prenup to be effective, both parties must have their own separate attorney.

FORBES: Five Reasons Your Prenup Might Be Invalid