All public records shall be open for personal inspection and copying, except those which by order of a court of this state or by law are specifically exempted from disclosure. Records shall be maintained by agencies to the extent and in the manner required by Article 5 of this chapter. Agencies shall produce for inspection all records responsive to a request within a a reasonable amount of time not to exceed three business days of receipt of a request; provided, however, that nothing in this chapter shall require agencies to produce records in response to a request if such records did not exist at the time of the request. In those instances where some, but not all, records are available within three business days, an agency shall make available within that period those records that can be located and produced. In any instance where records are unavailable within three business days of receipt of the request, and responsive records exist, the agency shall, within such time period, provide the requester with a description of such record and a timeline for when the records will be available for inspection or copying and provide the responsive records or access thereto as soon as practicable.