/etc/selinux/mls/users/system.users is in selinux-policy-mls 2:2.20140206-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 | #
# Do not edit this file.
# This file is replaced on reinstalls of this policy.
# Please edit local.users to make local changes.
#
user system_u roles { system_r } level s0 range s0 - s15:c0.c1023;
user user_u roles { user_r } level s0 range s0;
user staff_u roles { staff_r sysadm_r secadm_r auditadm_r } level s0 range s0 - s15:c0.c1023;
user sysadm_u roles { sysadm_r } level s0 range s0 - s15:c0.c1023;
user unconfined_u roles { unconfined_r system_r } level s0 range s0 - s15:c0.c1023;
user root roles { sysadm_r staff_r secadm_r auditadm_r system_r } level s0 range s0 - s15:c0.c1023;
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