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.
The notice for mercury control regulation is only 3 months. 
mnli hypothesis: The notice for mercury control regulation is only 3 months.  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.