Rules on Civil Procedure
Section 4. Appearance of parties. - It shall be the duty of the parties and their counsel to appear at the pre-trial. The non-appearance of a party may be excused only if a valid cause is shown therefor or if a representative shall appear in his behalf fully authorized in writing to enter into an amicable settlement, to submit to alternative modes of dispute resolution, and to enter into stipulations or admissions of facts and of documents. (n)