The Security Council, also known as the Senate Security Council, was a body within the Galactic Senate responsible for supervising the safety and protection of the Galactic Republic.
One of the powers held by the Security Council was the ability to trigger Order 65. This was a command for all forces in the Grand Army of the Republic stating that the Supreme Chancellor was considered a danger to the Galactic Republic and should be captured, or if needed, killed. Differing from Order 66, Order 65 never came to pass.