Notification 1328/MOIC, List C 02-2015, reserves several activities to Lao nationals. Included in the list is various 'minor' other architectural and engineering activities.
"Business Activities Reserved for Lao Nationals (Revised): [...]
- Architectural and engineering activities and related technical consultancy (specifically for the  consultancy on surveying, design, construction and architectural installation, Lao engineering services related to history, nature and culture and design, construction and installation of   22kv-35 kv and below 0.4 kv electrical distribution network)" (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>]