Any two of the persons associated may call the first meeting of such association, at such time and place as they may appoint, by notice in any newspaper published in the county in which such association is to be established, at least fifteen days before the time appointed; but such notice may be waived by a writing signed by all of the persons so associated, specifying the time and place for said meeting, and recorded at length upon the records of the association. Such association may make its own bylaws.