All orders can be enforced by police or other compliance and enforcement officials. People who don't follow the order could be fined.
As of July 1, 2021, provincial restrictions have eased significantly. However, if you violate any remaining health orders, police and regulatory officers continue to have the power to issue fines.
To see the list of full BC enforcement measures and violation tickets, see Violation tickets for unsafe COVID-19 behaviour.
If you fail to quarantine or isolate yourself (The federal government website explains the difference) as required upon returning to Canada from abroad, you can be fined or jailed under the Quarantine Act.