R12.1.3: Unable to print A/R Invoices with BPA after patching

After reading My Oracle Support note "Bill Presentment Architecture (BPA) Issue: Unable to Print AR Invoices using BPA Transaction Print - The Print Program Does Not Produce Any PDF Output - File Size = 0" via note 1933710.1 I learned that BPA can have an issue after applying an Oracle patch related to a different issue!  While it appears a template can be changed from xslfo to XSL-FO the change actually needs to take place in the Oracle provided code so instead of being a setup change it requires another Oracle patch to be deployed.