(e) The time for response under this Section may be extended by the public body for not more than 5 business days from the original due date for any of the following reasons:
(i) the requested records are stored in whole or in part at other locations than the office having charge of the requested records;
(ii) the request requires the collection of a substantial number of specified records;
(iii) the request is couched in categorical terms and requires an extensive search for the records responsive to it;
(iv) the requested records have not been located in the course of routine search and additional efforts are being made to locate them;
(v) the requested records require examination and evaluation by personnel having the necessary competence and discretion to determine if they are exempt from disclosure under Section 7 of this Act or should be revealed only with appropriate deletions;
(vi) the request for records cannot be complied with by the public body within the time limits prescribed by subsection (d) of this Section without unduly burdening or interfering with the operations of the public body;
(vii) there is a need for consultation, which shall be conducted with all practicable speed, with another public body or among 2 or more components of a public body having a substantial interest in the determination or in the subject matter of the request.
The person making a request and the public body may agree in writing to extend the time for compliance for a period to be determined by the parties. If the requester and the public body agree to extend the period for compliance, a failure by the public body to comply with any previous deadlines shall not be treated as a denial of the request for the records.