No one can impose tolls or selectively decide whose ships get access to such straits, said Coordinating Minister for National Security K Shanmugam. SINGAPORE: Singapore is "very wary" when other countries treat navigational rights and freedoms as discretionary privileges to be negotiated or paid for, Coordinating Minister for National Security K Shanmugam said on Monday (Apr 13). “Our position is - under the United Nations Convention on the Law of Sea, and customary international law, there is