Proposes a new constitutional amendment that modifies provisions relating to initiative petitions

HJR 135 proposes a constitutional amendment that prohibits Missouri laws from weakening citizens' initiative and referendum powers. It requires 80% approval in both legislative chambers to change any law or constitutional amendment enacted via citizen initiative after January 1, 2010, or to pass measures similar to laws rejected by referendum. The bill maintains current signature thresholds (5% of voters in two-thirds of congressional districts for laws, 8% for constitutional amendments) and ensures simple statewide majorities decide initiative and referendum votes. It also mandates that ballot summaries remain clear, unbiased, and subject to judicial review, preventing legislative attempts to restrict this process.