Section 9. No application for a license to operate a CATV system or for renewal, transfer or assignment of such a license shall be considered by an issuing authority unless it is accompanied by an application fee of one hundred dollars payable to the city or town. A licensee, serving more than two hundred and fifty subscribers, shall on or before March fifteenth of each year, pay to the commonwealth a license fee equal to eighty cents per subscriber served and to the issuing authority a license fee equal to fifty cents per subscriber served. In determining a license fee, the number of subscribers served shall be measured as of December thirty-first of the preceding calendar year.