§ 685. Filing of grievance procedure. Each government shall file with the clerk thereof and with the state civil service commission, on or before November first, nineteen hundred sixty-three, a copy of the grievance procedure established by such government; all subsequent amendments or revisions thereof shall also be filed with the clerk and the state civil service commission within fifteen days after adoption. All procedures so filed shall be open to public inspection. Neither the failure of the government to file a copy of the grievance procedure or any subsequent amendments nor the failure to do so timely shall affect the validity of such grievance procedure or any amendments thereto.