Former 100 metres world record holder Asafa Powell has been banned from athletics for 18 months for doping.
The 31-year-old Jamaican sprinter has competed at the last three Olympics and broke the world record in 2007 when he ran the 100 metres in 9.74 seconds at an event in Italy.
Powell tested positive for a banned substance in July of last year.
More top news
The annual event has earned a place in the record books ahead of the grand final of the 60th anniversary show in Austria this evening.
Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".
Some students argued that the centuries-old tradition of wearing gowns, suits and mortarboards to exams was 'archaic' and looked elitist.