For any audit year in which a municipality contributes materially less than 100% of the annual required contribution to its pension plan(s) as reported in accordance with GASB statement 27 or any successor statement, the municipality shall submit to the auditor general and the director of revenue, within three (3) months of completion of the financial statement, the municipality’s most recent actuarial study of the plan(s) and management’s recommendations for assuring future payments equal to the annual pension cost (APC).