17 Pa. C.S. § 901
The articles of incorporation may be amended at any regular or special meeting of the credit union, if notice of the meeting and of the proposed amendment or amendments is furnished each member at least ten days prior to the meeting at which such amendment or amendments will be considered. Notwithstanding statutory provisions to the contrary, the articles of incorporation may alternatively be amended by the members through mail ballot voting as provided in the bylaws.
Amendments to the articles of incorporation must be approved by a majority of the members present at any meeting at which the amendments are considered or, in the case of a mail ballot, by a majority of the members responding by mail ballot. The proposed amendments shall be acted upon only in the event a quorum of the members, as provided in the bylaws, is present or, in the case of a mail ballot vote, a number of returned mail ballots equal to the quorum of the members, as provided in the bylaws, exists.
17 Pa.C.S. § 901