(A) Requests calling for all records falling within a category shall be complied with unless compliance with the request would be unduly burdensome for the city, there is no way to narrow the request, and the burden on the city outweighs the public interest in the information. Before invoking this exemption, the city shall extend to the person making the request an opportunity to confer with it in an attempt to reduce the request to manageable proportions. If the city responds to a categorical request by stating that compliance would unduly burden its operation and the conditions described above are met, it shall do so in writing, specifying the reasons why it would be unduly burdensome and the extent to which compliance will so burden the operations of the city. Such a response shall be treated as a denial of the request for information.
(B) Repeated requests from the same person for the same records that are unchanged or identical to records previously provided or properly denied under this chapter shall be deemed unduly burdensome under this provision.
(5 ILCS 140/3(g))