5 C.F.R. § 330.209
(a) An RPL registrant is removed from the RPL at all registered grades or pay levels if the registrant:
(2) Receives a written cancellation, rescission, or modification to:
(b) An RPL registrant is removed from the RPL at registered grades or pay levels with a representative rate at and below the representative rate of a position offered by the agency if the offered position is below the last grade or pay level held and the registrant: