Issues in relation to which referendums are mandatory at the national level

Thailand
Constitution (2017)
Section 256. Subject to section 255, amendment to the Constitution may be made under the rules and procedures as follows:
[…]
(8) in the case where the draft Constitution Amendment is an amendment to Chapter I General Provisions, Chapter II The King or Chapter XV Amendment to the Constitution, or a matter relating to qualifications and prohibitions of persons holding the positions under the Constitution, or a matter relating to duties or powers of the Court or an Independent Organ, or a matter which renders the Court or an Independent Organ unable to act in accordance with its duties or powers, before proceeding in accordance with (7), a referendum shall be held in accordance with the law on referendum, and if the referendum result is to approve the draft Constitution Amendment, further proceedings shall then be taken in accordance with (7);