Section 2. The Commissioner of Civil Service shall be furnished by the Clerk of the Supreme Court and the Secretary of the Board of Examiners a list of the successful candidates in the respective bar or board examinations with their general averages, and preference shall be given to those obtaining the highest ratings in making appointments: Provided, That for those who have already passed the corresponding bar or board examinations, the eligibility shall be deemed to commence from the approval of this Act.