Professors make decisions that are stricter than what their university allows, and there should be no problem if they do. Two examples: 1. Universities usually

Professors make decisions that are stricter than what their university allows, and there should be no problem if they do. Two examples: 1. Universities usually have no or minimal dress-codes, but professors in lab courses or on field trips will have mandatory dress codes for safety or cultural reasons. 2. My university has mandatory minimum attendance for every in-person course, with 15 minute leeway allowed. But lots of profs enforce a 0 min or 5 min leeway. I am sure others can add more examples.