pointed out by Justice Teresita J. Leonardo-De Castro, the unconstitutionality of a statute is not a
cause of action that could be the subject of a counterclaim, cross-claim or a third-party complaint.
Therefore, it is not prohibited from being raised in the opposition in view of the familiar maxim
expressio unius est exclusio alterius.
Moreover, it cannot be denied that this issue affects the resolution of the case a quo because the
right of private respondent to a protection order is founded solely on the very statute the validity of
which is being attacked53 by petitioner who has sustained, or will sustain, direct injury as a result of
its enforcement. The alleged unconstitutionality of R.A. 9262 is, for all intents and purposes, a valid
cause for the non-issuance of a protection order.
That the proceedings in Civil Case No. 06-797 are summary in nature should not have deterred
petitioner from raising the same in his Opposition. The question relative to the constitutionality of a
statute is one of law which does not need to be supported by evidence.54 Be that as it may, Section
25 of A.M. No. 04-10-11-SC nonetheless allows the conduct of a hearing to determine legal issues,
among others, viz:
SEC. 25. Order for further hearing. - In case the court determines the need for further hearing, it may
issue an order containing the following:
(a) Facts undisputed and admitted;
(b) Factual and legal issues to be resolved;
(c) Evidence, including objects and documents that have been marked and will be presented;
(d) Names of witnesses who will be ordered to present their direct testimonies in the form of
affidavits; and
(e) Schedule of the presentation of evidence by both parties which shall be done in one day,
to the extent possible, within the 30-day period of the effectivity of the temporary protection
order issued. (Emphasis supplied)
To obviate potential dangers that may arise concomitant to the conduct of a hearing when
necessary, Section 26 (b) of A.M. No. 04-10-11-SC provides that if a temporary protection order
issued is due to expire, the trial court may extend or renew the said order for a period of thirty (30)
days each time until final judgment is rendered. It may likewise modify the extended or renewed
temporary protection order as may be necessary to meet the needs of the parties. With the private
respondent given ample protection, petitioner could proceed to litigate the constitutional issues,
without necessarily running afoul of the very purpose for the adoption of the rules on summary
procedure.
In view of all the foregoing, the appellate court correctly dismissed the petition for prohibition with
prayer for injunction and temporary restraining order (CA-G.R. CEB - SP. No. 01698). Petitioner may
have proceeded upon an honest belief that if he finds succor in a superior court, he could be granted
an injunctive relief. However, Section 22(j) of A.M. No. 04-10-11-SC expressly disallows the filing of
a petition for certiorari, mandamus or prohibition against any interlocutory order issued by the trial
court. Hence, the 60-day TRO issued by the appellate court in this case against the enforcement of
the TPO, the amended TPOs and other orders pursuant thereto was improper, and it effectively
hindered the case from taking its normal course in an expeditious and summary manner.