Unless I read something wrong, the proposal is to exempt BP from a certain set of mainly environmentally based laws on federal land and it doesn't speak to private land...where they have authority to enter for the purpose of patrolling the border anyhow.

With regard to federal land, this business seems to overlook the fact that all federal lands already have an enforcement presence that is charged with upholding "all" federal laws within the area of their jurisdiction. The National Park Service for example. With very few exceptions, these agencies will know the land and the relevant issues far better than border patrol and be much better equipped to deal with what comes up therein.

I don't know the details, but I can't imagine this getting too far. Even if it does, the actual effects will likely be minimal, perhaps a few sites in the North Cascades as there are a few trails that cross the border there well off the beaten path. Don't ask me how I know.