9.2 On the Topics of Difficulty and Discretion
The SELinux source policy is a sophisticated software system. It
includes dozens of object classes, scores of defined permissions,
more than 1,000 type transitions, thousands of object instances, and
tens of thousands of access-vector rules. You can think of the source
policy as a computer program and the security engine as a CPU that
executes the translated binary form of this program. So customizing
the SELinux policy is akin to performing software maintenance on a
program consisting of tens of thousands of noncomment source lines.