As you know, the federal government is responsible for developing the criminal law and determining what constitutes criminal conduct, but it is the provinces that apply the law.
Our focus is the non-disclosure of HIV status. The only guidance came in the form of Supreme Court decisions on what constituted a realistic possibility of transmission further to the charge of aggravated sexual assault, in cases involving the disclosure of HIV status. There may have been some consistency in application, but determining how to apply the instruction set out by the Supreme Court was still up to judges. Even then, clear differences emerged in how provinces were treating the Supreme Court's rulings.
Given the federal government's involvement and the fact that very few provinces adopt directives or guidelines on how to interpret the Supreme Court decisions, what constitutes a realistic possibility of transmission varies tremendously across the country, from B.C. to Nunavut. How the proverbial guillotine of the criminal law falls on people living with HIV differs drastically, depending on whether they are in Hull or Ottawa, for instance.
It can be likened to schizophrenia, in that people living with HIV don't really know how the state or the judicial system will interfere in their lifestyle, sex life and ability to thrive. If they can be deemed sex offenders, depending on where they travel to, how are they supposed to apply the U = U principle and lead a full and fulfilling life?