The MS scouts have no districts. In DDS, the groups are organized in 43 districts, each district must consist of at least 600 scouts. The districts are combined in 7 so-called areas. Leaders and Ranks Leaders are from almost all age groups. It is not unusual for a unit to have leaders of quite different ages.
Leaders are both old scouts and parents.
I believe there is a majority of non-parents. A few groups implement something on their own, but the general emphasis is not on advancement. There are merit badges for mini scouts, junior scouts, and normal scouts, but in many places these are not often used. These badges are often used to help the leaders and the scouts remember that safe use of some tools require training. This section now has a page of its own.