Civil servant teaching staff of university teaching bodies, Permanent Professors and Technical, Management, Administration and Services Staff (PTGAS), civil servants or employees with permanent ties, who justify their participation in the research activities referred to in article 61.1 of the LOSU, may apply for an EBC. Likewise, the aforementioned staff may request authorization to join this type of company or entity in which the university has a stake, by means of a temporary leave of absence.
https://www.uam.es/uam/en/innovacion/empresas-basadas-conocimiento