At Cambridge University the Proctors are nominated every May by colleges identified in a predetermined cycle. They then serve for one year from 1 October, assisted by their Deputy Proctors and two Pro-Proctors. They must have been a member of the Senate for three years, and must have resided two years at the university. The two Pro-Proctors are not, as at Oxford, nominated by the Proctors, but are also elected by the Regent House on the nomination of the colleges, each college having the right to nominate a Pro-Proctor for the year next before that in which it nominates the Proctor (Grace of 26 February 1863). Two additional Pro-Proctors are also elected by the Senate each year, on the nomination of the Vice-Chancellor and Proctors, to assist the latter in the maintenance of discipline (Grace of 6 June 1878).