https://www.slab.org.uk/faqs/who-enforces-the-act/
The Scottish Information Commissioner promotes and enforces the Act. The Commissioner is independent of any other body with legal powers to ensure the public’s right of freedom to information is upheld.
You can read more about the Information Commissioner and your rights under the Freedom of Information Act in a booklet “YOUR RIGHT TO KNOW: a guide to freedom of information law in Scotland”.
This is available from the Commissioner’s office, or on their website.