Personally, I do some publicity. I spread the word to my colleagues. I encourage them to find people with drug addiction or mental health problems and who meet our eligibility criteria. These are the people who make the requests; we do not do the selection. Afterwards, we decide if we shall use our discretionary power to allow them to take part in the program.
Evidence of meeting #42 for Public Safety and National Security in the 40th Parliament, 2nd session. (The original version is on Parliament’s site, as are the minutes.) The winning word was ottawa.
A recording is available from Parliament.