If a person's name is placed on inactive status at that person's request, it may, upon that person's written request and in the discretion of the Department, be restored to active status on the list. If a person's name is placed on inactive status without that person's request, it will be restored to active status only if the Department finds that there is good cause therefor. In any case, the person's name may be restored to active status only if the employment list on which the person has inactive status is still in existence; and the name shall be restored to active status according to the person's earned rating in the examination or combined score for efficiency and seniority, when restored to a reemployment list in a class designated as professional, scientific, administrative, management or executive, as the case may be.