X_PAY_HEADER_SOURCE is a [fixed lexicon] with the following values:\\

%%zebra-table
||Saved\\Value||Displayed Value
| 01 | IPPH Screen
| 02 | IPTR Screen
| 03 | IPTL Loader
| 04 | UPTG Generator
| 05 | External Source
| 06 | UPCPAY Generator
| 07 | UPRETRO Pay
| 08 | UPCVAC Vacation Pay
| 09 | UPVEND Proc Vendors
| 10 | UPTL Loader
| 11 | Final Pay
| 12 | UPCTSP Generator
| 13 | UPDISBV
%%