Answer: THE ADOPTION OF A CONSTITUTIONAL AMENDMENT.
A constitutional amendment is a modification of the constitution of a polity, organization or other type of entity. Amendments are often interwoven into the relevant sections of an existing constitution, directly altering the text. Conversely, they can be appended to the constitution as supplemental additions (codicils), thus changing the frame of government without altering the existing text of the document.
Most constitutions require that amendments cannot be enacted unless they have passed a special procedure that is more stringent than that required of ordinary legislation.
There are requirements for this in regions and countries, but the United States, Albania, China and Ethiopia requires two thirds of the chamber of legislature, amongst other requirements.