before Immigration and Customs merged, they said that if you are
human, Immigration will clear you.. if you are an animal or an
object, Customs cleared you..
the only exception is if you are dead... then your corpse will go
through Customs..
now, under ICA, we clear everyone but there is still Singapore
Customs which collect Customs Duties (only 4 things are dutiable in
Singapore: tobacco, alcohol, motor spirits and cars)
people still want to refer to the people there as "customs"

even in Malaysia, it's Immigration! (unless you are not human then
it's Customs)
btw, people do not understand this too.. you as a citizen to a
country, gives you a right of entry to your own country... however
if you go to another country, as a foreigner, you have no right of
entry but a privilege of entry...
therefore in another country, get the clearance from the other
country.. find out their laws first before going there..