> Relationships with Lao citizens: Lao law prohibits cohabitation or sexual contact between foreign citizens and Lao nationals except when the two parties have been married in accordance with Lao Family Law. Any foreigner who cohabitates with or enters into a sexual relationship with a Lao national risks being interrogated, detained, arrested, or fined. Foreigners are not permitted to invite Lao nationals of the opposite sex to their hotel rooms, and police may raid hotel rooms without notice or consent. Foreigners, including U.S. citizens of Lao descent, are not allowed to stay in the homes of Lao nationals, even family, without the prior consent of the village chief and local police.
https://travel.state.gov/content/travel/en/international-tra...
Under "Local Laws & Special Circumstances":
> Relationships with Lao citizens: Lao law prohibits cohabitation or sexual contact between foreign citizens and Lao nationals except when the two parties have been married in accordance with Lao Family Law. Any foreigner who cohabitates with or enters into a sexual relationship with a Lao national risks being interrogated, detained, arrested, or fined. Foreigners are not permitted to invite Lao nationals of the opposite sex to their hotel rooms, and police may raid hotel rooms without notice or consent. Foreigners, including U.S. citizens of Lao descent, are not allowed to stay in the homes of Lao nationals, even family, without the prior consent of the village chief and local police.