Since the Clear Skies Act provides much more than 26 months of notice for any mercury control regulation, there should be adequate time for compliance even if some facilities install PJFFs.
There are 30 months of notice for mercury control regulation. 
mnli hypothesis: There are 30 months of notice for mercury control regulation.  premise: Since the Clear Skies Act provides much more than 26 months of notice for any mercury control regulation, there should be adequate time for compliance even if some facilities install PJFFs.