According to the person familiar with the proposals, the new border security requirements call for 100 percent surveillance and a 90 percent apprehension rate of border crossers or would-be crossers in sectors where the majority of unauthorized entries take place.
One, advanced by Grassley, specifies that a requirement for 90 percent of would-be border crossers to be stopped or turned back must apply to the entire southern border, not just "high-risk" sectors.