it is in the Constitution of the Republic of Singapore.
PART X
CITIZENSHIP


Deprivation of citizenship on exercise of rights of foreign nationals, etc.
135. —(1) The Government may, by order, deprive a citizen of Singapore of his citizenship if the Government is satisfied that —

(c) he is of or over the age of 18 years and has, whether before or after attaining the age of 18 years, been ordinarily resident outside Singapore for a continuous period of 10 years (including any period of residence outside Singapore before 2nd January 1986) and has not at any time —

(i) during that period or thereafter entered Singapore by virtue of a certificate of status or travel document issued by the competent authorities of Singapore; or

(ii) during that period been in the service of the Government or of an international organisation of which Singapore is a member or of such other body or organisation as the President may, by notification in the Gazette, designate.

(2) For the purposes of clause (1) (a), the exercise of a vote in any political election in a place outside Singapore shall be deemed to be the voluntary claim and exercise of a right available under the law of that place.

(3) Where the Government has made an order under this Article depriving a citizen of Singapore of his citizenship, he shall cease to be a citizen with effect from the date of the order.



这个十年的应该才是引用来拒绝当年那些6, 70年代的人的吧。

五年的那个是只针对citizen of Singapore by naturalisation
Deprivation of citizenship
129.
(5) The Government may, by order, deprive of his citizenship any person who is a citizen of Singapore by naturalisation if the Government is satisfied that he has been ordinarily resident in foreign countries for a continuous period of 5 years and during that period has neither —

(a) been at any time in the service of Singapore or of an international organisation of which the Government was a member; nor

(b) registered annually at a consulate of Singapore his intention to retain his citizenship.

ref: http://statutes.agc.gov.sg/non_version/cgi-bin/cgi_retrieve.pl?&actno=Reved-CONST&date=latest&method=part

多谢回复!那就是说:如5年以上没回新, 只需每年上新加坡领事馆网站注册报道一下就行?
还请多多赐教:
在海外生活的新加坡人,每年的报税单照填照报,所得税,房地产税,医保费照交,CPF应该就不用再交了吧.
还有其他应当注意的特别事项吗?

嗨嗨!之所以我多问一句书面证明的事情,是因为,万一新加坡国籍被自动取消的话,如果能够拿到新加坡政府书信证明国籍已经被取消倒又容易办了:
据中国公安局说,以前曾经是中国籍的外籍人士可以依法向公安部申请恢复其中国国籍,但是前提之一是必须出示其外国国籍已经被取消或放弃的书面证明.
可是,按新加坡移民厅这边目前的做法是:必须先取得有效的外国护照之后才可以向移民厅申请放弃新加坡国籍的.

呵呵!这下就啥也办不成了:一边是要等你放弃了才给你恢复;一边是要等你拿到了才让你放弃.....

小百姓拗不过两边政府各说各的,只好随遇而安,顺其自然啦!

:)
:)

Reply from Agony Uncle
Historical reasons aside.
Citizenship cannot be revoked with public case.