The fee for a license to operate a boat for carrying passengers for hire shall be $50 for each boat. The fee for a license for engaging in the business of renting boats for hire shall be $30, plus an annual fee for each boat rented or offered for rent of $1 for each boat less than 16 feet in length; $2 for each boat 16 feet or over and less than 26 feet in length; and $8 for each boat 26 feet or over in length. No boat shall, after March 1, 1960, be rented or offered for rent until such license has been granted and the boat marked as hereinafter provided.