Первая каритинка - все для студентов. Т. е.  The regulations are for students.

Вторая картинка -

YOU MAY - нет примера

YOU CAN, YOU ARE(NOT) ALLOWED, YOU ARE (NOT)  PERMITTED - Нет примера

 YOU MAY NOT smoke sigarettes

YOU WILL NOT marry during the term of your contract.

YOU MUST NOT - нет примера

 YOU MAY UNDER NO CIRCUMSTANCES dye your hair