119. Section 118 also applies to the executive assistant or to a member of the executive staff who belongs to the civil service staff at the time of his appointment under section 117. As long as such a person is employed on such a staff, he retains his classification on the day of his appointment to such staff and receives as additional remuneration, where such is the case, the difference between the remuneration attached to his classification and that granted to him as an executive assistant or member of the executive staff.