39 Pa. Stat. § 47
Immediately after his appointment, the assignee shall give written or printed notice to all the creditors known to him of the fact of his appointment; notifying them that on a given day and hour, not more than twenty days distant, and at a given place, particularly designated, a meeting of all the creditors will be held, for the purpose of selecting an additional assignee or assignees, if they deem the same to be necessary. At such meeting a majority in amount of the creditors present, in person or by proxy--partnerships or joint creditors however having but one vote each--may select as many more assignees as there were assignees named in the original deed of assignment. The assignees originally named shall, by deed duly executed, acknowledged and recorded, transfer to those thus selected an equal and undivided interest in said estate, and all the assignees thus named and selected, shall thereafter act as joint assignees, with the same effect as if all were originally named in the original deed of assignment.
39 P.S. § 47