The thing I like best about this is defining attitude to the Authority etc before defining what they are; sounds likely to bring out more surprises in play than the other way round. Also an unusual take on what maps are.
The legacy role of holding the other pencil is fun, too. I wondered if there could be more in the possession aspect, like you need to engage in some kind of ritual to take a pencil from the person who currently possesses it? I'm not entirely sure what I mean by that, but if these are significant marks then maybe ownership of the markers, and transferring it, can be expanded?