def METHOD_NAME(self):
    name = self.cleaned_data["name"].strip()
    if name.lower() == "flagged":
        raise forms.ValidationError(_("Reserved label name"))
    elif len(name) > Label.MAX_NAME_LEN:
        raise forms.ValidationError(_("Label name must be %d characters or less") % Label.MAX_NAME_LEN)
    # first character must be a word char
    elif not regex.match(r"\w", name[0], flags=regex.UNICODE):
        raise forms.ValidationError(_("Label name must start with a letter or digit"))
    return name