(1) The Secretary shall require 2-way end-of-train devices (or devices able to perform the same function) on road trains, except locals, road switchers, or work trains, to enable the initiation of emergency braking from the rear of a train. The Secretary shall prescribe regulations as soon as possible, but not later than December 31, 1993, requiring the 2-way end-of-train devices. The regulations at least shall
(A) establish standards for the devices based on performance;
(B) prohibit a railroad carrier, on or after the date that is one year after the regulations are prescribed, from acquiring any end-of-train device for use on trains that is not a 2-way device meeting the standards established under clause (A) of this paragraph;
(C) require that the trains be equipped with 2-way end-of-train devices meeting those standards not later than 4 years after the regulations are prescribed; and
(D) provide that any 2-way end-of-train device acquired for use on trains before the regulations are prescribed shall be deemed to meet the standards.