(1) In this Act, "data-sharing" means the disclosure of information, including personal data, by a public body to another public body.

(2) For the purposes of this Act, an addition or change to the information held on an information system under the control of a public body that results automatically from an addition or change to information held on an information system under the control of another public body, is deemed to be a disclosure by the second mentioned public body to the first mentioned public body of the information so added or changed on the information system under the control of the first mentioned public body.