Members of the participating clubs who are aged 15 on the day of the race .
Were not 15 on 31 August of the previous year , may also run in RR10 league races , but only with the explicit permission of Members ' clubs or coaches .
Members of the participating clubs who are aged 15 on the day of the race , but were not 15 on 31 August of the previous year , may also run in RR10 league races , but only with the explicit permission of their clubs or coaches .