Petitioner (plaintiff) brings this special action challenging the order of the respondent trial judge denying his motion to dismiss without prejudice. We accepted jurisdiction under Ariz. Const, art. 6, § 5 and, in an order, approved the order of the superi- or court with opinion to follow. The primary issues raised in this special action are:
(1) Whether the trial judge abused her discretion in denying plaintiff’s motion to dismiss his action without prejudice so he could refile his action after the effective date of the Uniform Contribution Among Tortfeasors Act?
(2) Whether the Uniform Contribution Among Tortfeasors Act applies retroactively to actions filed prior to the effective date of the Act? 1
On October 11, 1983, plaintiff John H. Cheney filed a complaint alleging negligence against defendants Loren V. Grizzard and Tanner Chapel Nursing Home. Two days later on October 13, the summons and complaint were served upon Grizzard. Thereafter an answer was filed. Almost one year later the Arizona Legislature adopted the Uniform Contribution Among Tortfeasors Act, A.R.S. §§ 12-2501 —12-2509 (hereafter referred to as the “Act”). This Act provides for the application of comparative negligence in Arizona and became effective August 31, 1984. Four days prior to the effective date of the Act plaintiff filed a Motion to Dismiss Without Prejudice intending to refile his complaint after the Act became effective to gain the advantage of the new comparative negligence law. At the time plaintiff filed this motion, no “substantive” pretrial motions had been made and no trial date had been set.
Plaintiff filed his motion to dismiss under Rule 41(a)(2), Ariz.R.Civ.P., 16 A.R.S., which allows a plaintiff to dismiss his case without prejudice after an answer has been filed. 2 Rule 41(a)(2) states in relevant part:
“Except as provided in paragraph 1 of this subdivision of this Rule, an action shall not be dismissed at the plaintiff’s instance save upon order of the court and upon such terms and conditions as the court deems proper. * * * Unless otherwise specified in the order, a dismissal *448 under this paragraph is without prejudice.”
The right to dismiss after an answer has been filed, however, is discretionary with the trial court, and must be made by motion with notice to the defendants, a hearing and a court order.
Goodman v. Gordon,
“[T]he question to be resolved is whether ‘the defendants acquired in the course of these proceedings some substantial right or advantage which will be lost or rendered less effective by a dismissal without prejudice * * *. The court is concerned with the deprivation of substantial legal rights, such as loss or unavailability of a defense, and not mere convenience, or easy accessibility, to proof.’ ” (emphasis added)
The facts in the case at bar indicate that plaintiff’s reason for seeking a dismissal without prejudice was so he could refile under the new law and gain the application of comparative negligence instead of contributory negligence. We believe that the unavailability of the contributory negligence defense deprives defendant of a substantial right.
Cf. Mercier v. Mercier,
Contributory negligence is an affirmative defense in Arizona.
See
Ariz. Const. art. 18, § 5;
Pearson & Dickerson Construction, Inc. v. Harrington,
After the Act, however, slight negligence by plaintiff will not bar his damage action, but rather plaintiff’s damages are reduced in proportion to the relative degree of plaintiff’s fault which is the proximate cause of the injury or death. A.R.S. § 12-2505. Thus, even though plaintiff may be 90% at fault a jury applying comparative negligence could award plaintiff 10% of the total damages proved, which could be very substantial, whereas under the old law recovery would probably be nothing. We believe that the loss of the contributory negligence defense is substantial and constitutes extraordinary circumstances.
Crawford v. Superior Court,
144 Ariz.
*449
498,
Plaintiff next argues that the new comparative negligence law applies retroactively to his action which was filed prior to the effective date of the Act. We disagree as the statute clearly prohibits such a result.
In Arizona, a statute will have prospective operation, unless it was intended to have retroactive effect.
Stanley v. Stanley,
“Sec. 3. Applicability.
“The provisions of title 12, chapter 16, article 1, Arizona Revised Statutes, as added by this act, only apply to actions filed, on or after the effective date of this act.” (emphasis added)
1984 Arizona Sessions Laws 881 Ch. 237, § 3. We can discern no plainer language manifesting an intent to act prospectively. We find that the Act does not apply to actions filed prior to the effective date.
Prayer for relief denied.
Notes
. We do not decide in this case whether the Uniform Contribution Among Tortfeasors Act applies to actions which occurred prior to the effective date of the Act but which are filed after the effective date of the Act. We are merely deciding whether the Act applies to an action filed before the effective date that occurred before that date.
. Before an answer is filed, plaintiff has an absolute right to voluntarily dismiss his complaint, which is accomplished automatically by plaintiffs filing a notice of dismissal. See Rule 41(a)(1), Ariz.R.Civ.P., 16 A.R.S.
. “A.R.S. § 1-244. Retroactivity of statutes
"No statute is retroactive unless expressly declared therein.”
. “Sec. 5. Effective date.
"This act is effective from and after August 30, 1984." 1984 Arizona Session Laws 881 Ch. 237, § 5.
