222. Subject to the provisions of this section, an Act of the Federal Parliament or of the Provincial Legislature may provide for the exercise of additional functions by the Federal Public Service Commission, or, as the case may be, by the Provincial Public Service Commission;

Provided that where the Act is a Provincial Act, it shall be a term of such Act that the functions conferred by it shall not be exercisable in relation to any person who is not a member of one of the services of the Province except with the consent of the President.