Coast Mountain Bus Company (CMBC) is the contract operator for bus

Bus

A bus is a road vehicle designed to carry passengers. Buses can have a capacity as high as 300 passengers. The most common type of bus is the single-decker bus, with larger loads carried by double-decker buses and articulated buses, and smaller loads carried by midibuses and minibuses; coaches are...

 transit services in Metro Vancouver and is a wholly owned subsidiary of the South Coast British Columbia Transportation Authority known locally as TransLink, the entity responsible for transit. The buses form part of the integrated transit network of the lower mainland.
The Coast Mountain Bus Company operates the buses throughout Greater Vancouver (except West Vancouver which operates its own Blue Bus

West Vancouver Blue Bus

West Vancouver Blue Bus Transit system began in 1912, and is the oldest continuously operated, municipal system in North America. These buses are part of the TransLink network but continue to be owned and operated by the District Municipality of West Vancouver under a contract to...

 system and three contract operators that provide Community Shuttle as well as HandyDART services):

• 191 bus routes in total
  • Regular transit service
  • Express Coach Service to suburban municipalities
  • Trolley Bus
    Trolleybus
    A trolleybus is an electric bus that draws its electricity from overhead wires using spring-loaded trolley poles. Two wires and poles are required to complete the electrical circuit...
    
     Service - 12 routes primarily in the City of Vancouver
  • NightBus - special routes after midnight, 12 routes with plans for expansion
  • B-Line express buses (2 routes - see below)
  • Community shuttles - routes operating minibuses
• SeaBus
  SeaBus
  The SeaBus is a passenger-only ferry service in Metro Vancouver, British Columbia, Canada. It crosses Burrard Inlet to connect the cities of Vancouver and North Vancouver. The SeaBus is owned and operated by the Coast Mountain Bus Company and is an important part of TransLink's integrated public...
  
   - passenger ferry across the Burrard Inlet
  Burrard Inlet
  Burrard Inlet is a relatively shallow-sided coastal fjord in southwestern British Columbia, Canada. Formed during the last Ice Age, it separates the City of Vancouver and the rest of the low-lying Burrard Peninsula from the slopes of the North Shore Mountains, home to the communities of West...
  
  

The regional transit network including bus routes, service levels and fares are set by TransLink.
Basically the honour system, a Fare Paid Zone is a clearly marked territory on which passengers must have valid proof of payment

Proof-of-payment

Proof-of-payment or POP is an honor-based fare collection approach used on many public transportation systems. Instead of checking each passenger as they enter a fare control zone, proof-of-payment requires that each passenger carry a ticket or pass proving that they have paid the fare. Ticket...

.