Dimitris Lignadis, a well-known stage actor and director in Greece, turned himself in to police on Saturday afternoon.
The snowstorm, described by authorities as the most severe in 20 years, blanketed the city and its ancient monuments Tuesday and left parts of the capital without power and water.
While snow is common in Greece's north and its mountains during the winter, it is rare on the islands and in the centre of the capital.
Supporters of the reform, due to be approved by lawmakers on Thursday, argue that Greek universities have long been plagued by violence and those against it are afraid it will hinder freedom of expression.
Olive producers in Greece say the harvest will fall by up to a fifth this year because the pandemic is preventing the arrival of seasonal workers