their academic regalia
... that beginning in 1763, Columbia University students were required to wear their academic regalia daily in order to steer them away from New York City brothels?
... that beginning in 1763, <a href="./Columbia_University" id="mwARs" rel="mw:WikiLink" title="Columbia University">Columbia University</a> students were required to wear <b id="mwARw"><a href="./Academic_regalia_of_Columbia_University" id="mwAR0" rel="mw:WikiLink" title="Academic regalia of Columbia University">their academic regalia</a></b> daily in order to steer them away from New York City brothels?