Notwithstanding the provisions of paragraph (2), no Bill for the amendment of any of the provisions specified in this paragraph shall become law unless such Bill has been referred to the People by referendum and approved by a majority of the valid votes cast at such referendum, in addition to being approved by a two-thirds majority of the whole number of Members of Parliament (including those not present). The provisions which shall require approval by referendum are—

(a) Article 1 (The State);

(b) Article 2 (Unitary State);

(c) Article 3 (Sovereignty of the People);

(d) Article 4 (Fundamental Rights and Freedoms);

(e) Article 4A (Democratic Socialist Republic); and

(f) Any other provision which forms part of the Basic Structure of the Constitution, as determined by the Supreme Court in terms of Article 120.