Although enacted in August 2005, the law technically did not take effect until 2006 because it contained a provision that allowed Congress to decide not to implement it. See (c) and (d) below:
SEC. 110. DAYLIGHT SAVINGS.
(a) AMENDMENT.—Section 3(a) of the Uniform Time Act of 1966
(15 U.S.C. 260a(a)) is amended—
(1) by striking ‘‘first Sunday of April’’ and inserting ‘‘second
Sunday of March’’; and
(2) by striking ‘‘last Sunday of October’’ and inserting ‘‘first
Sunday of November’’.
(b) EFFECTIVE DATE.—Subsection (a) shall take effect 1 year
after the date of enactment of this Act or March 1, 2007, whichever
is later.
(c) REPORT TO CONGRESS.—Not later than 9 months after the
effective date stated in subsection (b), the Secretary shall report
to Congress on the impact of this section on energy consumption
in the United States.
(d) RIGHT TO REVERT.—Congress retains the right to revert
the Daylight Saving Time back to the 2005 time schedules once
the Department study is complete.