Provided, That in cities where a commission exists for the care of public parks, the term and appointment of such commission shall not be changed by this act, but shall be and remain as provided by the act of assembly, and by the ordinance of councils creating such commission for the care and maintenance of public parks. And such shade-tree commission shall, twice in every year, report in full its transactions and expenditures for the municipal fiscal year then last ended, to the authority under and by which it was appointed: Provided, That an existing park commission, acting under this enactment, may embody its report in its regular report to the councils, as by law or ordinance provided.
53 P.S. § 3293