A person who is an ongoing Parliamentary Service employee is engaged as an ongoing APS employee at a higher classification than the person's classification as an ongoing Parliamentary Service employee immediately before the engagement if:
(a) the person is engaged as an ongoing APS employee at a classification mentioned in column 1 of an item in the following table; and
(b) immediately before the engagement, the person was engaged as an ongoing Parliamentary Service employee at the classification mentioned in column 2 of that item.