There are various forms of protection, protection against public activities, for example, in a national park or a national historic site, where the public access is controlled. There is some legal framework to deal with that.
In the case of cultural heritage properties, where in fact the biggest threat is really lack of maintenance and lack of good conservation practice, there is no legal requirement on Parks Canada. It's a heritage steward, and that's its purpose in being set up, but there's nothing in an act that says Parks Canada must maintain these places up to a certain standard.
For example, there's nothing that exists that is similar to the Canada National Parks Act, which makes ecological integrity the first priority. It puts an obligation on the minister, and on the managers of those places. There is no such obligation on any Parks Canada-administered national historic site.