D Class for the youngest and B Class for the eldest
(Max capacity for youngest = 80cc until end of the year, then 50cc mono and 80cc twinshock)
(Max capacity for eldest = 125cc until he leaves his youth years, however there is a dispensation for this year below national level)
As for dates, maybe try your trials recorder, if you require the calender for the North Western Centre I can email it you.