Why EMC powerpath devices changing permissions set by udev in Red Hat Enterprise Linux 6?

Issue

• Why EMC powerpath devices changing the permission set by udev with simple alteration to device?
• Why the permission set by udev on EMC powerpath devices are not persistent?
• Setting a persistent owner/group/mode on EMC powerpath devices in RHEL 6.

$ cat etc/udev/rules.d/62-qdx-asm.rules 
# ASM Devices
ACTION=="add", KERNEL=="emcpower[h-l]1", OWNER="oracle", GROUP="dba", MODE="0660" 

[oracle@localhost ~]$ ls -l /dev/emcpowerl1
brw-rw---- 1 oracle dba 120, 177 Sep 19 18:06 /dev/emcpowerl1
[oracle@localhost ~]$ touch /dev/emcpowerl1
[oracle@localhost ~]$ ls -l /dev/emcpowerl1
brw-rw---- 1 root disk 120, 177 Sep 20 09:28 /dev/emcpowerl1