For a little background, in Ontario, an "IT professional" is defined as "professionals who use specialized knowledge and professional judgement to work with information systems based on computers and related technologies." (http://www.labour.gov.on.ca/english/es/guide/guide_22.html#information)
This definition is so broad that it covers everything from tech support staff to software engineers. According to the Ontario Employment Standards act, an IT professional is exempt from sections VII and VIII of the act, which cover Hours of Work, Daily Rest Periods, Weekly/Bi-Weekly Rest Periods, Eating Periods, and Overtime. This means that there are no regulations for IT professionals in these areas. Naturally, it seems you'd be hard-pressed to find an ITP that can claim overtime in Ontario, and, I suppose, technically, employers here do not even have to provide you with time to eat or sleep.