Any constitution that has special rules for its amendment is said to be

Any constitution that has special rules for its amendment is said to be rigid. A rigid constitution is one that cannot be easily amended or changed by the government. It usually requires a special process, such as a supermajority vote in the legislature or a referendum, to make any amendments. This is done to ensure that the constitution is not easily changed and provides stability and continuity in governance. Countries such as the United States, Australia, and India have rigid constitutions.