The person who takes out that ad, as long as it relates only to their own sexual services, is immunized from prosecution, which I would note is different from allowing prostitution. In no way does Bill C-36 attempt to allow the practice of prostitution. It merely immunizes from prosecution certain types of behaviour that are frequently engaged in by the persons who are considered to be exploited by the practice of prostitution.
On July 7th, 2014. See this statement in context.