According to the student handbook, the only mention of chalking is: Chalking on sidewalks or buildings is prohibited.
Hmm. Well, that of course would leave free parking lots and streets. Streets of immense foot traffic (and reasonably safe levels of car traffic) such as Warren, Wyllys, Mocon Circle and the road leading to the Observatory. As well as parking lots including the Admissions and Hi-rise parking lots.
And, well, if one wanted to get immensely technical, are cemented pathways sidewalks? Because according to Webster’s:
sidewalk (n): a usually paved walk for pedestrians at the side of a street.
Huh. Interestingly enough, many of the pathways about campus are not in fact at the side of a street. Go figure.