Committee or commission?

Dutch commissie is sometimes committee in English and sometimes commission. What’s the difference? A committee is a small group of people brought together to discuss a particular topic at any level (e.g., the audit committee, the budget committee). A commission, however, is a body of people officially authorised to do government business or conduct an official inquiry (e.g., the Trade Commission, the Forestry Commission, the Securities and Exchange Commission, the European Commission).