What configuration files/scripts control permissions for cd/dvd drive

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http://forums.fedoraforum.org – As a followup to my thread [SOLVED] k3b: "No optical drive found", I'm trying to locate the configuration files/scripts that control the default permissions for the cd/dvd device (/dev/sr0) and the permissions assigned when a disk is inserted. The issue is that when I change the device permissions to permit ugo+rw access, it is reset to its default ug+rw state upon insertion of a disk. Thanks for your help. (HowTos)