from ..message_base import MessageBase
from ..constants import Subaddress

class MsgA6(MessageBase):
    """
    Message A6: Not Applicable
    
    ID: A6
    Direction: BC -> RT (Receive)
    Subaddress: 06
    Rate: N/A
    Document Ref: 7.1.6
    
    NOTE: This message is currently Not Applicable per ICD.
    The class exists for architectural completeness.
    """
    SUBADDRESS = Subaddress.RX_NOT_USED
    IS_TRANSMIT = False

    # No fields defined.
    pass