The following is taken from
Singapore Constitution on Citizenship:
(2) A person born outside Singapore shall not be a citizen of Singapore by descent by virtue of clause (1) unless —
(a) his birth is registered in the prescribed manner at the Registry of Citizens or at a diplomatic or consular mission of Singapore within one year, or such longer period as the Government permits, after its occurrence; and
(b) he would not acquire the citizenship of the country in which he was born by reason of his birth in that country where —
(i) in the case of a person born before the date of commencement of section 7 of the Constitution of the Republic of Singapore (Amendment) Act 2004, his father is a citizen of Singapore by registration at the time of his birth; or
(ii) in the case of a person born on or after the date of commencement of section 7 of the Constitution of the Republic of Singapore (Amendment) Act 2004, either his father or mother is a citizen of Singapore by registration at the time of his birth.
This clause basically says that one who is born overseas shall not be eligible to Citizenship by Descend UNLESS he did not acquire the citizenship of the country of birth and provided that if he is born before 2004, his father must be Singapore Citizen OR if he is born AFTER 2004 (the year they amend the Constitution) either his father or mother is a Singapore citizen.
The spirit of the Singapore Constitution in disallowing Dual Citizenship is embedded here, practically states that no one, even from birth, should hold dual citizenship. i.e. If you acquire the citizenship of the country of birth (which is foreign), then you are NOT eligible for Singapore citizenship by descend.
Taking of oath for those who are born in foreign lands at the age of 21 is a just a formality, at the age of legality, to make sure you that you do not hold dual/multiple citizenship. If you have dual/multiple citizenship when you are taking that oath, you will be charged for false declaration under oath in Singapore court. But this doesn't mean that the Constitution allows or accept you to hold dual/multiple citizenship when you are under the age of 21.
My few simple questions to ICA is just to see whether they are acting constitutionally or not. Apparently, Dr Yaacoob's reasoning is totally flawed. He must explained how his children ended up with dual citizenship when our Singapore Constitution has clearly stated that his children will not be eligible for citizenship by descend if they have acquired citizenship of the country of birth.
Goh Meng Seng