At the land border it's U.S. Customs and Border Protection, through a reciprocal exchange under this provision. That's how it would be regulated. Under proposed section 93, that gives the agency the authority to prescribe or to compel airlines and air carriers to submit outbound flight manifests. This particular section is about collection of exit information. It gives the agency the authority to collect exit information and to identify in regulations who we receive that information from, the timing, the manner, and the circumstances.
On October 3rd, 2017. See this statement in context.