In a letter to students on Wednesday, the University Rector wrote that a conservative dress code  (specifically dark suits and shoes for men; jacket, blouse and trousers or long skirts for women) must be followed when attending class or exams.

From October 1, there is also no place in the university for mini-skirts, flip-flops, heavy make-up, inappropriate fashion accessories, or unkempt fingernails and hair, the letter reportedly continued.

In reply, both male and female students, plus apparently at least one teacher - around 10 people in total - all took off clothes in class to protest at the 'mini-skirt ban'. Students are reportly going to continue their protest on Monday, by attend classes in flip-flops and beach towels.

Note: File photo at top shows a topless protest in Paris.