The Department may, upon its determination that particular
sources are adversely contributing to an air pollution episode, order
such sources to implement the procedures of their source curtailment
plans. Upon notification by the Department of the existence of an
episode and the need to implement the source curtailment plan, the
person responsible for the source affected shall immediately implement
such plan. If an air pollution episode or localized incident occurs
during the period when a source curtailment plan is under review by
the Department, such plan shall be implemented, provided, however,
that if such plan is not acceptable to the Department, other curtailment
action shall be taken as specified by the Department.