Sec. 4. (a) Except as provided in subsection (b), no records shall be destroyed, removed, or transferred from any office until a period of at least three (3) years shall have elapsed from the date on which the records were filed, nor even after that time if the records are in frequent use by the officer having charge of the office.
(b) Records may be destroyed, removed, or transferred from any office before three (3) years elapse after the date on which the records were filed if the destruction, removal, or transfer is according to an approved retention schedule.