To become a Junior member you must be between 5 and 14yrs at the time of application or renewal. Membership terms of (1 or 3-Year Saver) are available, with access to all listed Member Benefits during that period. Applicants must be under 12yrs when applying for a 3yr membership. Choose the 3YR option for the discounted rate. To receive your Membership letter, AGM invites, newsletters and renewal notices from the Munda Biddi Trail Foundation you must opt-in to receive emails from the Munda Biddi Trail Foundation during the checkout process. Checkout stage. This category of membership can't receive voting rights at the MBTF general meetings. Important: Your membership will automatically renew at the end of the term unless cancelled by the member. Full Terms & Conditions here.