Under the current guidelines, a transferee must answer either male or female (but not both, nor can they leave the question blank). The FFL cannot question their choice, but he/she can record whatever info they deem relevant to the transaction on Line 31. This kind of scenario is what the proposed change(s) are intended to address.
Not sure what this is addressing . . . my point was that when we submit the request in the NICs system the last step is to verify the license/ID information. If the transferee is listed as male on their license and selects female or whatever the other option(s) might be on the 4473 and it doesn't match the ID what then?