(a) Immediately upon the effective date of the appointment of a short-term guardian, the short-term guardian shall assume all duties as short-term guardian of the minor as provided in this Section. The short-term guardian of the person shall have authority to act as short-term guardian, without direction of court, for the duration of the appointment, which in no case shall exceed a period of 365 days. The authority of the short-term guardian may be limited or terminated by a court of competent jurisdiction.
     (b) Unless further specifically limited by the instrument appointing the short-term guardian, a short-term guardian shall have the authority to act as a guardian of the person of a minor as prescribed in Section 11-13, but shall not have any authority to act as guardian of the estate of a minor, except that a short-term guardian shall have the authority to apply for and receive on behalf of the minor benefits to which the child may be entitled from or under federal, State, or local organizations or programs.