def nullable_string_tuple_to_string_array(nullable_string_tuple):
    """
    Converts a nullable string tuple to an array representing it.
    
    Parameters
    ----------
    nullable_string_tuple : `None` or `tuple` of `str`
        The value to convert.
    
    Returns
    -------
    array : `list` of `str`
    """
    if nullable_string_tuple is None:
        array = []
    else:
        array = list(nullable_string_tuple)
    
    return array