The clerk shall give notice of borough assembly meetings, shall attend all meetings of the assembly and keep the journal of its proceedings, and shall authenticate by the clerk’s signature and record in full in a book or file kept for that purpose all ordinances and resolutions duly indexed and open to public inspection. In case of the temporary absence of the clerk, the assembly may appoint a clerk pro tempore, with all the powers, duties and obligations of the clerk, who shall be duly qualified.