Not entirely true. The limit is 300 grams per passenger………. if you have more, you have to declare it, and better have a good reason for bringing it in. I was stopped because I claimed 450 grams, coming in from Phnom Penh, they asked me what the excess 150 grams were for. I told them my daughter was getting married and it was a marraige gift. After much deliberation they wrote something in my passport and let me pass thru, even my wife could not understand what they wrote, just some gibberish. One young immigration officer came along side of me and whispered ‘Good Excuse they would have confiscated anything over 300 grams'.