Multiple operational hours

Multiple operational hours

 
Hello guys
 
In mi office we got three differents groups with different operational hours
group 1 (first level): they work 24/7
Group 2 & 3: 07:15 until 17:30 Monday - Friday
Im wondering if there is a way for my in wich I can stop the elapsed time of an SLA for group 2 & 3 on the time they aren't working 
 
I hope i was claer enough
 
Regards

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