Bill to amend law on Constitution revision referendum likely to pass Diet Today 06:00 am JST Today | 06:42 am JST TOKYO A bill to amend the national referendum law on revision of the Constitution is likely to pass parliament by the end of the current session through mid-June, as the pro-revision ruling party agreed Thursday to accept the opposition force's request to tweak it. The debate over the bill, which will facilitate voting in a referendum on revision of the supreme law by setting conditions similar to those of national elections, had been stalled for around three years with the main opposition party calling for restrictions on campaign advertising and finance.