The safe third country agreement was signed in 2004. It's always good to look at an agreement that is that old to see if there are ways to modernize it. That's a position I've always taken. In addition to that, one of the ways it can be modernized, of course, is to utilize technology to enhance the agreement.
Again, to answer you question, when you have a bilateral agreement, you cannot change it unilaterally. Canada cannot just change that agreement by itself—neither can the United States. It has to be done together.