Make a medallion required for 30 days out of this month, 29 days out of next month, 28 days out of the next month, etc, until in 30 months, medallions are not r

Make a medallion required for 30 days out of this month, 29 days out of next month, 28 days out of the next month, etc, until in 30 months, medallions are not required at all.