Anyone who went against policy as defined by the party leadership could face sanctions or expulsion.
Only one student has ever faced disciplinary expulsion from the academy.
Students breaking these rules may face expulsion from the university.
Students face expulsion if they refuse to abide the law.
American officials believe diplomats could face expulsion if the matter is not resolved soon.
The school's student conduct court will decide whether any players should face expulsion.
The first year the plan went into effect, 1,550 students (18% of the total student body) faced expulsion.
He said the four students would face disciplinary hearings and possible expulsion.
The first group that faced expulsion this year included at least 800 nurses.
Nine of the students face expulsion, according to the ruling, which was distributed within the business school on Friday.