Please see the Lao government website.
Prepared by our U.S. Embassies abroad. With its network of 108 offices across the United States and in more than 75 countries, the U.S. Commercial Service of the U.S. Department of Commerce utilizes its global presence and international marketing expertise to help U.S. companies sell their products and services worldwide. Locate the U.S. Commercial Service trade specialist in the U.S. nearest you by visiting http://export.gov/usoffices.
Foreign Trade Regulations
The Lao Trade Portal, established in 2012, has extensive information for exporters and importers.