The regime is set up to regulate the timing, the manner, and the circumstances. A good example would be that the timing would be upon entry to the United States; the manner would be reciprocal electronic exchange of entry information; and the circumstances would be at the land border. It gives the flexibility within regulation to stipulate how the information is collected, and to tailor the collection to be seamless and to work in all modes, whether it's by train, plane, automobile, or vessel.
On October 3rd, 2017. See this statement in context.