The Mayor or other authorized city official shall act on the application for a parade permit within 3 days, Saturdays, Sundays and holidays excepted, after filing thereof. If he or she disapproves the application, he or she shall mail to the applicant within the 3 days, Saturdays, Sundays and holidays excepted, after the date on which the application was filed, a notice of his or her action stating the reasons for his or her denial of the permit.