(a) The platting authority shall approve or disapprove a plat within 60 days after it is filed, or shall return it to the applicant for modification or correction. Unless the applicant for plat approval consents to an extension of time, the plat is considered approved and a certificate of approval shall be issued by the platting authority on demand if the platting authority fails to act within 60 days.
(b) The platting authority shall state in writing its reasons for disapproval of a plat. If the platting authority approves a plat, the plat shall be acknowledged, filed, and recorded in accordance with AS 40.15.010 — 40.15.020.