Pub. L. 110-53, tit. XV, subtit. C, sec. 1541
MEMORANDUM OF UNDERSTANDING ANNEX.
SEC. 1541. MEMORANDUM OF UNDERSTANDING ANNEX. Not later than 1 year after the date of enactment of this Act, the Secretary of Transportation and the Secretary shall execute and develop an annex to the Memorandum of Understanding between the two departments signed on September 28, 2004, governing the specific roles, delineations of responsibilities, resources, and commitments of the Department of Transportation and the Department of Homeland Security, respectively, in addressing motor carrier transportation security matters, including over-the-road bus security matters, and shall cover the processes the Departments will follow to promote communications, efficiency, and nonduplication of effort.