We are trying to figure out how to reset the SLA when an INC is assigned from one group to another. 

Here is the situation:

We are a Tier 3 support team, if someone opens a ticket with our Tier 1 and it sits long enough to breach the SLA, then Tier 1 assigns it to our group, with nothing being touched on the original INC (no status change, no replies, etc) it gets assigned to us with theSLA already breached. Is there a way to reset the SLA upon Group Reassignment? Thanks in advance!