[AlphaCommerceHub] Whether an `OrderDetails` → `ItemTaxExempt` positive value should be really expressed as the «TRUE» string, not as «Y» string (like for other boolean parameters)?

The documentation says about ItemTaxExempt:

Is the product tax exempt or not.
TRUE – the product is tax exempt and AlphaHPP will not calculate tax for the product.

developer.alphacommercehub.com.au/docs/alphahpp-#product-line-information

So should I pass it as the «TRUE» string, not as «Y» string (like for other boolean parameters)?

I have got a response from AlphaCommerceHub:

The value you need to pass is ‘TRUE’ if the item is tax exempt.