Vehicles over 5500 kilogrammes LGVW report to scale.
Can be accompanied by any of these tabs:

R-104-TA: Including buses not licenced in BC.
R-104-TB: Recreational vehicles exempt.
R-104-TC: Empty chip trucks exempt.
R-104-TD: Empty farm trucks exempt.
R-104-TE: Empty log trucks exempt.
R-104-TF: Distance and direction to scale.
https://www2.gov.bc.ca/gov/content/transportation/transportation-infrastructure/engineering-standards-guidelines/traffic-engineering-safety/traffic-signs-markings
British Columbia Ministry of Transportation and Infrastructure