Default Asset Shutdown in Time Dependent Data to On

Any thoughts as to how one can set the Asset Shutdown indicator in the Time Dependent tab to on/checked/true? There is no option in the field group rules to make any of the time-dependent fields maintainable at the Asset Class level.

I know I can create a validation, but I want the field checked when an asset is automatically created via a PO, i.e. without intervention on the part of the user.

Any insight would be greatly appreciated.

Thanks.