71 Pa. Stat. § 1500
The Governor, with the advice and consent of the senate, shall, as soon as practicable after the passage of this act, appoint five commissioners, who, together with the general agent and secretary hereinafter mentioned, shall constitute a board of public charities; one of the persons so appointed shall hold office for one year, one for two years, one for three years, one for four years, and one for five years, unless sooner removed; appointments to fill vacancies caused by death, resignation or removal before the expiration of terms, may be made for the residue of such terms, by the Governor, subject to the consent of the senate, and all appointments to fill vacancies caused by expiration of terms shall be made in the same manner, and shall be for the period of five years each.
71 P.S. § 1500