Notification 1328/MOIC, List C 02-2015, reserves several activities to Lao nationals. Included in the list is interior constructions works, such as electrical installation and plumbing activities.
"Business Activities Reserved for Lao Nationals (Revised): [...]
- Electrical installation (specifically for the electrical installation inside a building)
- Installation of water pipes, heaters and air-conditioners (specifically for the installation of water pipes in a city, water supply system and air conditioning system in a building)" (Notification 1328/MOIC, List C 02-2015)
Notification 1328/MOIC, 13 July 2015, List C 02-2015.
[<a href="http://www.laotradeportal.gov.la/kcfinder/upload/files/MOIC_1328_2015_Eng.pdf">Notification</a>]