15 U.S.C. § 263 : US Code - Section 263: Designation of zone standard times

Search 15 U.S.C. § 263 : US Code - Section 263: Designation of zone standard times

The standard time of the first zone shall be known and designated
as Atlantic standard time; that of the second zone shall be known
and designated as eastern standard time; that of the third zone
shall be known and designated as central standard time; that of the
fourth zone shall be known and designated as mountain standard
time; that of the fifth zone shall be known and designated as
Pacific standard time; that of the sixth zone shall be known and
designated as Alaska standard time; that of the seventh zone shall
be known and designated as Hawaii-Aleutian standard time; that of
the eighth zone shall be known and designated as Samoa standard
time; and that of the ninth zone shall be known as Chamorro
standard time.