Just found the website for you. Click below.
http://www.ssdcl.com.sg/traffic_police_dept.asp
Anyway, information copied from website.
Conversion of Foreign Driving Licence
If you hold a foreign driving licence and intend to remain in
Singapore for less than twelve months, you are not required to
convert your foreign driving licence to a Singapore driving
licence. You may drive in Singapore with a valid foreign driving
licence. However, if your licence is not in English, in addition to
a valid foreign driving licence, you are required to have an
International Driving Permit. If an International Driving Permit is
not available, an official translation of your driving licence in
English is required.
If you are holding an Employment Pass/Dependent Pass/Student
Pass/or Work Permit and are likely to reside in Singapore for more
than twelve months and you wish to continue to drive in Singapore,
then you are required to convert your foreign diving licence to a
Singapore driving licence before the end of your twelve months
stay.
To convert to a Singapore driving licence, you are required to pass
the Basic Theory Test (BTT) which will familarise you with traffic
rules and Singapore's Highway Code pertaining to traffic related
issues peculiar to Singapore. A Singapore Permanent Resident (PR)
who wishes to drive in Singapore is required to convert his foreign
driving licence after becoming a PR.
Application for conversion of foreign driving licence for
Singaporeans and PR are not normally granted unless:
they have stayed in the foreign country continuously for at least
six months after the date of first issue of their foreign driving
licence
the foreign driving licence at the time of application for
conversion must have been issued for a period of six months or
more
for PRs, the driving licence was obtained before the applicant
became a PR.
Your application for conversion of driving licence must be made in
person at Traffic Police Headquarters located at 10, Ubi Avenue 3.
Please bring along the following documents:
Result slip to prove that you have passed the Basic Theory
Test
Passport and NRIC/Entry Permit/Employment Pass/Dependent
Pass/Social Visit Pass/Work Permit, etc (whichever is
applicable)
A passport-size colour photograph with white background
A matt/semi-matt finish and a fee of $50
For overseas students, please produce proof of six months' stay in
the country e.g. educational transcripts or Letter of Acceptance
into the Educational Institution (120) and the relevant visa in the
passport
For those employed overseas, please produce Letter of Employment or
Income Tax Returns or supportive documents from employers and the
relevant Employment Pass in the passport
A valid Qualified Foreign Driving Licence
An official translation of the driving licence if it is not in
English
Extract of Driving Licence from the Licensing Authority that
indicates the date of first issue of Driving Licence if this date
of issue is not indicated on your driving licence
For Malaysian licence holders, an extract from Jabatan Pengangutan
Jalan (JPJ) is compulsory.