Every doctoral student must have at least two supervisors, one of whom is the principal supervisor.
Those admitted after 1 January 2014 will also have access to a reference group. This includes at least one scientifically qualified university teacher without any connection to the doctoral student's research project.
According to the Higher Education Ordinance, a doctoral student is entitled to change supervisor on request.
The doctoral student has the right to supervision provided that the Vice-Chancellor does not decide to withdraw supervision and other resources. Reasons for withdrawal may include the failure of the doctoral student to follow their individual study plan.