Core shall have a maximum size of 15 people, but may be smaller than this. Core will self-select their own membership, subject to committer approval, as described below. Core decisions must contain a summary of how the core members voted on an issue. This is needed in order for committers to make an informed decision in their elections. This does not apply to the procedure used to grant new committer membership.
Administrators are responsible for the operation and maintenance of the FreeBSD project.
Defining common sense is nearly impossible. Core members may hold administrative positions, but the position itself does not convey core membership. Every year, committers elect one-half of core, with the candidates being either an existing member of core, or a nominee chosen by core. These nominees are confirmed by a vote of committers, as outlined above. A nominee that is rejected by the committers may be re-nominated after one year has passed.