We refer to fiscal year of Lao Tax Department which will be at the end of 30th September 2015 for each year, the Lao custom officer announce that IM4 must be clarified and closed out within 7 days after registration. That means IM4 issued before 1st October 2015 and the cargo did not import to Lao yet, the custom officer will not allow the cargo to pass the border until re-issue the new IM4.