Manage Suppliers: How to make Tax Payer Id mandatory based on other fields with in the same comp

Summary:

I am trying to make the Tax Payer Id as required with the following options in Required property in the Page composer component.

#{bindings.TaxPayerCountryName.inputValue == "Australia"}

or

#{bindings.StateReportableFlag.inputValue == 'true' ? true : false}

or

#{row.StateReportableFlag.inputValue == 'true' ? true : false}

But it is not returning a suitable value as True.

is there a better way to make the Tax Payer id Field mandatory based on the other components in the page (Procurement → Manage Suppliers)

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