Cisco – What IOS is LLQ first supported?

I am facing a rollback in IOS on my WAN routers and need to clarify what release LLQ (Low latency queuing) commands are supported. I am currently running 12.2(7b) and I’m rolling back to 12.1(13).
My 12.2(7b) utilizes multiple LLQ-based configuration, so I’m wanting to clarify that 12.1(13) is going to support LLQ. If not, I’ve got to redesign my CBWFQ (class based weighted fair queuing) paramaters to get around that fact.

Thanks in advance;