13. Where several defendants file separate contestations, the advocate of the plaintiff shall receive for each additional contestation one-half of the fee prescribed in section 24 or in section 25 of the Tariff according to the state of the proceedings. For the purposes of this section, the intervenant, the mis-en-cause and the defendant on warranty, if they conclude to the rejection of the principal action, shall be considered a defendant filing a separate contestation.
R.R.Q., 1981, c. B-1, r. 13, s. 13.