Subchapter IX. Standard Time 15 U.S. Code §260. Congressional declaration of policy; adoption and observance of uniform standard of time; authority of Secretary of Transportation 15 U.S. Code §260a. Advancement of time or changeover dates 15 U.S. Code §261. Zones for standard time; interstate or foreign commerce 15 U.S. Code §262. Duty to observe standard time of zones 15 U.S. Code §263. Designation of zone standard times 15 U.S. Code §264. Part of Idaho in fourth zone 15 U.S. Code §265. Transfer of certain territory to standard central-time zone 15 U.S. Code §266. Applicability of administrative procedure provisions 15 U.S. Code §267. "State" defined