The BAF rate is calculated using the formula: BAF = Fuel Prices x Trade Factor. The trade factor is baked on average fuel consumption according to the route, travel distance, size of the container, and other factors. 

BAF rates are set by individual shipping lines, but are monitored for collusion by the EU Commission.  

The Bunker Adjustment Factor (BAF) applies to all types of cargo. However, the BAF rate does vary depending on the size of the container required, so if your cargo requires more space, this may attract a higher BAF rate.