singapore singapore suspend trade relations north korea late pyongyang major trade partner cut commercial tie toughen u.n. sanction weapons program customs notice obtain thursday show move come two months unite state impose north korea-related sanction number firm individuals include two entities base singapore singapore prohibit commercially trade goods democratic people republic korea dprk city-state customs say notice send traders declare agents last tuesday refer country official name suspension would take effect nov. fauziah a. sani head trade strategy security director-general customs say notice repeat breach new prohibitions punishable fine 200,000 147,340.50 four time value goods trade imprisonment three years add singapore north korea seventh large trade partner philippines pyongyang fifth big trade partner suspend trade north korea september comply u.n. resolution tension korean peninsula escalate north korea young leader kim jong un step development weapons defiance u.n. sanction north korea test series missiles year include one fly japan conduct sixth big nuclear test september pyongyang maintain diplomatic presence singapore embassy financial district september singapore issue travel advisory urge citizens avoid non-essential travel north korea diplomatic representation interview national public radio may singapore minister foreign affairs vivian balakrishnan say country ready cut diplomatic tie north korea january last year singapore-based chinpo ship company private ltd fin 180,000 facilitate shipment arm north korea violation u.n. sanction reut.rs/2arbm14 singapore suspend trade relations north korea