Need for shut-off valve for gas line under the slab

Our new kitchen addition has a 30k BTU griddle in the middle and is serviced by an under-slab line.

Shouldn't there be a shut-off valve in the line right before it dives under the slab? Don't codes or common sense call for one?

If the under-slab line develops a leak, the entire house supply would need to be shut down if there isn't a shut off valve.

All the other gas lines in the house are located in the attic.

Any suggestions?

Thanks, Ted

--------- Not sure if code requires the shutoff, but for peace of mind it's a good idea to install one.

In our house the shutoff for the grill was inside the garage. Was cause the line corroded out where it went under the slab after 35 years.

LB