“For the purposes of this Act, information is held by a public authority if— (a) it is held by the authority, otherwise than on behalf of another person, or (b) it is held by another person on behalf of the authority.”
“(1) Any person (in this section referred to as “the complainant”) may apply to the Commissioner for a decision whether, in any specified respect, a request for information made by the complainant to a public authority has been dealt with in accordance with the requirements of Part I. … (3) Where the Commissioner has received an application under this section, he shall either— (a) notify the complainant that he has not made any decision under this section as a result of the application and of his grounds for not doing so, or (b) serve notice of his decision (in this Act referred to as a “decision notice”) on the complainant and the public authority. … (5) A decision notice must contain particulars of the right of appeal conferred by section 57.”
“In this Act, unless the context otherwise requires— …“body” includes an unincorporated association”