Originally Posted by frascaflyer

Found it.

20-F-1-a-(9) If the lost flying was originally assigned under Section 20-H-5, or Step Five or Step Six of Section 20-I, the Add Pay the Lineholder received under those provisions shall be removed. Instead, the 100% Add Pay percentage he was entitled to under the original assignment shall apply to the scheduled pay value of the replacement Trip(s) he performs in conjunction with his obligation under Section 20-F-1-a. Section 20-L-6 shall not apply to such Lineholder.

and

20-F-1-a-(10) If the lost flying was originally assigned under Section 20-H-4, the Add Pay the Lineholder received under that provision shall be removed. Instead, the Add Pay percentage he was entitled to under the original assignment shall apply to the scheduled pay value of the replacement Trip(s) he performs in conjunction with his obligation under Section 20-F-1-a. If the Add Pay percentage he was entitled to under the original assignment is 100%, Section 20-L-6 shall not apply to such Lineholder. If such Add Pay percentage is seventy-five percent (75%), Section 20-L-6-a shall not apply and Section 20-L-6-b shall apply but at twenty-five percent (25%). If such Add Pay percentage is fifty percent (50%), Section 20-L-6-a shall not apply and Section 20-L-6-b shall apply without modification.

It's helpful to know the reason behind things and the references rather than a simple "that's how it works in the real world."

My apologies, Slats. You are indeed correct.