my $asn_ext = Convert::ASN1->new;
    $asn_ext->prepare( $Biblio::ILL::ISO::1_0_10161_13_3::desc );
    # some error checking here, snipped for brevity

    $_asn = Convert::ASN1->new;
    $_asn->prepare( $Biblio::ILL::ISO::asn::desc );
    # some error checking here, snipped for brevity
    $_asn_initialized = 1;

    # "1.0.10161.13.3" is what it *should* be, according to the ISO 10161 maintenance agency:
    #$_asn->registeroid("1.0.10161.13.3",$asn_ext->find("APDU-Delivery-Info"));
    # "1" is what it *is*, by looking at a hex dump of the request record
    $_asn->registeroid("1",$asn_ext->find("APDU-Delivery-Info"));