The new online membership on the website is for full members which are adult members.
The youth section standing order for family membership is in effect a youth membership with a 'parent registration' or family member. This will make the child a youth member of the club but the parent will not be a full member of the club. We will also register the child with the RFU as a 'youth member' of the club and the parent as a 'family member' of the club. However for the avoidance of doubt neither will be 'full members' of the club.
Only an adult can be a 'full member' of the club.
You do not have to be a full member of the club and can remain a family member with your child but their are benefits such as priority access to international tickets, discounts and for players there are other benefits too.