Rules on Civil Procedure
Section 4. Use of depositions. - At the trial or upon the hearing of a motion or an interlocutory proceeding, any part or all of a deposition, so far as admissible under the rules of evidence, may be used against any party who was present or represented at the taking of the deposition or who had due notice thereof, in accordance with any one of the following provisions;
(a) Any deposition may be used by any party for the purpose of contradicting or impeaching the testimony of deponent as a witness;
(b) The deposition of a party or of any one who at the time of taking the deposition was an officer, director, or managing agent of a public or private corporation, partnership, or association which is a party may be used by an adverse party for any purpose;
(c) The deposition of a witness, whether or not a party, may be used by any party for any purpose if the court finds: (1) that the witness is dead, or (2) that the witness resides at a distance more than one hundred (100) kilometers from the place of trial or hearing, or is out of the Philippines, unless it appears that his absence was procured by the party offering the deposition, or (3) that the witness is unable to attend or testify because of age, sickness, infirmity, or imprisonment, or (4) that the party offering the deposition has been unable to procure the attendance of the witness by subpoena; or (5) upon application and notice, that such exceptional circumstances exist as to make it desirable, in the interest of justice and with due regard to the importance of presenting the testimony of witnesses orally in open court, to allow the deposition to be used; and
(d) If only part of a deposition is offered in evidence by a party, the adverse party may require him to introduce all of it which is relevant to the part introduced, and any party may introduce any other parts. (4a, R24)