(Aaron Schwartz/CNP/Bloomberg)Key Takeaways: FMCSA estimates the proposed rule could place 9,000 commercial drivers out of service each year. DOT said the rule would strengthen enforcement in U.S.-Mexico border commercial zones. The Federal Motor Carrier Safety Administration has proposed codifying English-language proficiency enforcement standards for commercial drivers, a move the agency estimates could put 9,000 drivers out of service each year. ELP standards have been on the books since 1937 for commercial drivers. Tightening border enforcementDOT noted the proposed rule would eliminate “a dangerous loophole at the U.S.-Mexico border.