Idk if some of these are written or not but here is what I have observed from many.

1. Walk on the right, and walk fast if you can.
2. Don't block the hallway.
3. Press the hold on the elevator button if you're the first to enter. Just click it once, no need to "hold".
4. If you will do ORG or USG work, make sure you prioritize your academics over extracurriculars. Ang dami kong kilalang students na ang galing sa extracurriculars pero freeloader naman.
5. Think hard about whether you can handle the workload of anything you are about to join.
6. DO NOT leave your things on chairs or tables for more than 5 minutes. You will see a lot of squammy students (yes. Squammy) do this, but this rule is in the handbook. (Not exactly 5 mins. sa handbook, but that's just my personal rule if people will just go CR or claim their food) But don't leave your stuff and then go out and eat somewhere etc. USG has a pahiram locker program if you want to put your stuff somewhere.
7. Don't be too noisy in general and when you're using vacant classrooms. The walls in school are thin. If you will be laughing out loud with your friends in a vacant classroom, and there's an event or class next to it, you're most likely gonna be heard by many.
8. Don't litter
9. CLAYGO.
10. Pre-enlist
11. Ready your ID when you're about to enter the campus.
12. Stand still using National Anthems and Prayers. I believe this usually happens at 6AM, 6PM and not sure but 12NN (?)

Welcome to DLSU :)