I think it covers access to all info, not just that made available at meetings. Theimplication of it not applying to Parish Councils would mean that they would not be able to claim an exemption under FOI for providing exempt information! The act says "Confidential and exempt information
9.—(1) Nothing in this Part is to be taken to authorise or require the disclosure of confidential information in breach of the obligation of confidence.
(2) Nothing in this Part—
b)requires a relevant local government body to disclose to the public or make available for public inspection any document or part of a document if, in the opinion of the proper officer, that document or part of a document contains or is likely to contain exempt information.
The Proper Officer of a Town or Parish Council is the Clerk. Town & Parish Councils are defined in the act as relevant local govt bodies in Part 3