X is a Project Manager who works in a matrix organisational structure with an authoritarian leadership style. Team members are seconded on a part-time basis to teams led by X, who will then contribute to their individual performance appraisals at the end of each year.

X requires all team members to follow exactly what he tells them without question because he has the authority to provide negative feedback in their performance appraisals. According to the French and Raven model, select the type of power that X is using in these circumstances.