The official ZULU rule is as follows.

When you are the last player
You have to RUN and gun
You can use frags, flash bangs and any weapon of your choice

You are not allowed to walk, peek, kneel, or crawl

If the tangos are at a long distance, you have to run to them
If the room is full move left or right and flash or frag the room
If you are stuck on top of a structure flash then climb down
If you have to kneel or crawl to get through an opening this is obviously acceptable

The concept behind this rule is for you to be moving at all times in the goal to either finish the map or just doing a suicide run to end the round

For those who don’t want to be heroes you can always suicide

If you don’t notice you are last an OS admin will “ZULU” you, to let you know your last
OS has a zero tolerance for “ZULU” spamming. The first warning is with a kick, repeated offenders will be banned
Admins who abuse this will have their admin status removed

Thank you for respecting our server rules and enjoy your stay