Q.
The Federal Constitution is supreme. However, it can be amended by Article 159. Why is it so?
A.
Article 159 of the Federal Constitution allows amendment to the Constitution, provided that proper procedures are followed.
Hence, amending the legislation is valid, even if it is inconsistent with the Federal Constitution, so long as it complies with the procedures set out in Article 159.
These are two different things. In interpretation of Article 4(1), where all laws after Merdeka Day shall comply to The Constitution, it is not the part of the law - the Constitution - which spell out amendment. The judiciary has held that the word 'law' in Article 4(1) means only ordinary laws enacted by Parliament and not laws that would amend the Constitution like Article 159. Only the normal/ordinary laws must accord with the Constitution, but the laws to amend the Constitution need not. Otherwise, 'no change whatsoever may be made to the Constitution'.
Indeed, if there is 2/3 majority in the Parliament, laws can be passed to amend the Federal Constitution allowable by Article 159.
Ref:
Wan Arfah Hamzah (2009) A First Look at the Malaysian Legal System. Oxford Fajar. Pg: 40.