(b)
 Submission and approval of plan 
The Secretary shall require each electric utility subject to this section to—
(1)
submit, within 1 year after August 13, 1981, and have approved by the Secretary, a conservation plan which meets the requirements of subsection (c) of this section; and
 
(2)
implement such plan during the 5-year period beginning on the date of the initial approval of such plan.