Require Filling Out a Nested Table

[Dialect_Junk]

Hello, all. How can I make completing a nested table required based on information in parent table?

The parent table is named “Timecard,” and asks: “Operate Fleet?”

If the answer is “Yes”, I want the nested table - “Fleet Inspections” - to require completion.

The “Required” field in the parent table for the nested table (REF_ROWS) is grayed out and wont allow writing an expression.

Some other way to do this?.. Thank you!