Yes but you must seek for approval.

DR . Segun Michael Abegunde

thank you very much for answer And do you think it has an impact on the scientific academic approval of universities of eligibility to ask for time

I think you need approval by the university

Yes but with a formal permission from head of the faculty.

The department must approve the college

The department must approve the college

DR . Segun Michael Abegunde , DR . Hajer Essa , DR . Ali Rezaee , DR . Abdulkareem Salman , DR . Zainab alag Hasan ,

thank you very much for answer

It depends on particular circumstances.

DR . Piotr T. Nowakowski

thank you very much for answer And I agree with you

The university does not allow, but the institution I work in - permits (regulated by law).

DR . Nihada Ahmetovic

thank you very much for answer