Market Services Production (MSP) tested the functionality of Shortfall related charge codes in Map Test that have never been run in Settlements Production since their inception. The change is required to ensure that CAISO Internal BAIDs are not invoiced and to address issues in billing and invoicing related templates that kept Default Loss Invoice from generating expected results. The BPM changes are documentation only updates as the the fixes are associated with design template invoice related charge types not visible to market participants. The impacted charge codes are CG CC 5901 Shortfall Allocation Reversal, CG CC 5910 Shortfall Allocation, and CG CC 5912 Default Loss Allocation. The effective trade date of the change is 4/1/2011 and the anticipated implementation date is 4/27/2022.