• Provides the S4C television service
• Ensures that the services conform with the relevant regulatory requirements, including the Ofcom Broadcast Code
• Considers the views of the public about S4C programmes
• Approves the S4C annual strategy, budget and long-term financial plan
• Oversees, approves and scrutinises the appropriate management of S4C
• Operates as a public body
• Prepares annual reports and accounts
• Appoints a Chief Executive and a Secretary

The Board doesn't get involved with any day to day decisions, such as commissioning or editorial decisions. This arrangement has existed since 1982.

The Board ensures that it remains at arms-length from decision made by S4C officers, especially those that relate to the channel's content.