Notwithstanding the one hundred five megawatt maximum, the
board may increase the amount of power that a utility is
required to
own or purchase at the rates established pursuant
to section 476.43 if the board finds that a utility, including
a reorganized utility, exceeds its 1990 Iowa retail peak
demand by twenty percent and the additional power the utility
is required to purchase will encourage the development of
alternate energy production facilities and small hydro
facilities. The increase shall not exceed the utility's
increase in peak demand multiplied by the ratio of the
utility's share of the one hundred five megawatt maximum to
its 1990 Iowa retail peak demand.