Hi all,

I'm new for this.  I've created a service template in Service Catalog and the form as follow:

Now I've created two Pick list fields on the form named "Branch Located" and "Branch Address"

There's a set of values from BA1, BA2.....BA990 in the field "Branch Address" and  BL1, BL2....BL99 in the field "Branch Located". 

Is there any simple rules so that when the requester choose BL1 in "Branch Located" and then only BA1 to BA10 are shown in "Branch Address" without showing other values? When the requester choose BL2, only BA11 to BA20 are shown in the Branch Address field?