The most common SELinux policy store names are
mls. None of the names assigned to policy stores are fixed, though, so it is a matter of convention. Hence, it is recommended to consult the distribution documentation to verify what the proper name of the policy should be. Still, the name often provides some information about the SELinux options that are enabled through the policy.
One of the options that can be enabled is MLS support. If it is disabled, then the SELinux context will not have a fourth field with sensitivity information in it, making the contexts of processes and files look as follows:
To check whether or not MLS is enabled, it is ...