If I may, on behalf of the Canadian Association of Chiefs of Police, I'll give some highlights of the differences between the provincial legislation in Ontario and the federal legislation.
The purpose is to have an investigative tool to aid police in preventing and solving crimes of a sexual nature; it's for crime prevention and law enforcement purposes. In Ontario, it has automatic registration for any resident for a criteria sex offence. The notification of absence is for 15 days prior to ceasing being a resident, rather than in the federal case, where it is not later than 15 days if the offender is outside of Canada for 15 days.
In Ontario, it also includes vehicle information, whereby offenders are required to report vehicle information for the database, the registry. Then, of course, last but not least, one of the features Ontario has is the geo-mapping capability. The registry includes maps to identify offender residences in relation to offences and incidents, which is very helpful as an investigative tool. In the case of the national legislation, it doesn't have that capability.