A constitution that requires a plebiscite or a referendum to be amended is
Answer Details
A constitution that requires a plebiscite or a referendum to be amended is called a "rigid" constitution. This means that the constitution is difficult to change, and the process to amend it requires a significant amount of effort, such as a vote of the people. In contrast, a "flexible" constitution can be easily changed by the government or legislature without the need for a plebiscite or referendum. A constitution that is "written" is one that is codified in a single document, whereas an "unwritten" constitution is based on a combination of laws, court decisions, and customs.