From BBKA constitution
7.11 Junior Members: Individuals under the age of 18 years, for whom a membership fee has been paid to their AAM or one of its component associations and in respect of whom a capitation is subsequently paid to the BBKA and for whom a contact name and address has been supplied to the BBKA. Junior membership shall cease when the Junior attains the age of 18 and shall be automatically and immediately amended to Registered Membership for the remainder of that membership year, without further payment of any additional capitation in respect of that yea