hello,

yes, according to the official website you are required to follow some rules in the college arena:

• Your college ID is a must and you have to wear it all the time in the campus and provide them to the person asking for it.
• Dress Code is  boys are expected to be in full pants and clean shirts. Low-waist trousers/pants are not allowed. Girls are expected to dress in formal & decent attire and avoid wearing tight, transparent, sleeveless, or revealing outfits.
• Uniforms & dress codes are prescribed by the respective authorities for different academic streams in order to promote unique identity with discipline.
• Smoking is strictly prohibited.

Among other rules. These rules are too be strickly followed.

https://hkbkpuc.com/rules-regulations.php

hope this helps!!