QoS and VLAN question

I want to setup QoS by applying priorities to different traffic (using set traffic-policy priority-queue QUEUE class 6 xxx). We use a lot of VLAN and I would like to apply it to all of them. I tried to find an answer to this question but with no luck. If I apply this traffic-policy to eg. eth1 will this get applied to all of the VLAN defined on eth1? Or do I have to apply this traffic-policy to all of the VLANs (eth1.x)?

And if I would like to apply some other rules to separate VLANs, would applying them to the VLAN override the rules on global eth1?

Thanks!