def METHOD_NAME(name="probe_cc") -> List[str]:
    p = request.args.get(name)
    if p is None:
        return []
    validate(p, string.ascii_uppercase + ",")
    ccs = commasplit(p)
    for cc in ccs:
        if len(cc) != 2:
            raise ValueError(f"Invalid CC value in parameter {name}")
    return ccs