[¶ 1] Lee Paulson’s mother and siblings (“the Paulson family”) appealed from district court orders interpreting the will of Lee Paulson in favor of his fiancee, Robyn Risovi, denying a motion for reconsideration, ánd ordering distribution of Lee Paul-son’s estate. We affirm.
I.
[¶ 2] Lee Paulson and Risovi were engaged to be married, with a wedding set for July 18, 2009. On June 26, 2009, Lee Paulson and Risovi executed an antenup-tial agreement. The antenuptial agreement contained several terms: an agreement by Lee Paulson to name Risovi as the beneficiary of.his life insurance policy, an agreement by Lee Paulson that his will would transfer specific real property to Risovi, and an agreement by Lee Paulson to establish a testamentary trust for the benefit of. Risovi’s daughter. On the same date, Lee Paulson executed a will. The will established the trust for Risovi’s daughter, devised real property to “my wife, Robyn,” bequeathed all of Lee Paul-son’s tangible personal property to “my spouse, Robyn,” if she survived him, and devised his residuary estate to “my spouse, if my spouse survives me[.]” Article Six of the will outlined the definitions governing the will, and provided, “My spouse’s name is Robyn Risovi and. all references in this Will to ‘my spouse’ are to her only.” A footnote followed this statement: “This Will has been prepared in anticipation of the upcoming marriage of ... Lee Paulson *478 and Robyn Risovi set for July 18, 2009.” Lee Paulson died on July 15, 2009, three days before the scheduled wedding.
[¶3] Risovi filed a petition for construction of Lee Paulson’s will, and the Paulson family also filed a petition for construction of the will. The district court held a hearing on the petitions and found Lee Paulson’s will was unambiguous, Riso-vi was an unconditional devisee of the will, and she was entitled to take under the will. The district court found the definition and footnote in Article Six of the will did not manifest an intent to have the will conditioned upon the marriage, but described the beneficiaries and the circumstances surrounding the drafting of the will. The district court declined to read the antenup-tial agreement together with the will to determine Lee Paulson’s testamentary intent, as encouraged by the Paulson family, because the antenuptial agreement was not incorporated into the will by reference. The Paulson family appealed, and the appeal was remanded to determine if the estate was supervised. The district court entered an order for supervision, and this Court dismissed the Paulson family’s appeal without prejudice. The Paulson family moved for reconsideration, which was denied. The district court entered orders distributing the estate according to Lee Paulson’s will and the court’s previous order arid staying distribution pending the current appeal.
II.
[¶ 4] “We decide for ourselves the construction of an unambiguous will.”
Estate of Zimbleman,
A.
[¶ 5] The Paulson family argues the district court erred by interpreting Lee Paulson’s will in favor of Risovi because the will and antenuptial agreement unambiguously establish the devises to Risovi were contingent upon her marriage to Lee Paulson.
[¶ 6] If the language of a will is clear and unambiguous, the testator’s intent must be determined from the four corners of the will itself.
Neshem,
[¶ 7] Article Six of the will states, in part, “My spouse’s name is Robyn Riso-vi and all references in this Will to ‘my spouse’ are to her only.” A footnote to this definition states, “This Will has been prepared in anticipation of the upcoming marriage of ... Lee Paulson and Robyn Risovi set for July 18, 2009.” The Paulson family argues this footnote shows Lee Paulson intended the devises to Risovi to be conditioned upon the marriage, and the devises to Risovi must fail because the *479 marriage never occurred. Risovi responds this language is descriptive, not conditional, and establishes Lee Paulson intended the will to be effective before and after the marriage.
[¶ 8] “An estate may be granted upon a condition, either express or implied, upon performance or breach of which the estate shall either commence, be enlarged, or be defeated.”
Ruud v. Frandson,
[¶ 9] We have previously considered what constitutes a condition precedent in a will. In
Zimbleman,'
the testatrix’s will provided any of her children who wanted the land she owned at her death could purchase ‘the land “upon the agreement of the remaining children[.]”
Zimbleman,
[¶ 10] Rather, the footnote evidences Lee Paulson’s intent that the will be operative both before and after the marriage. Section 30.1-06-01(lj(b), N.D.C.C., provides that a surviving spouse who married the testator after the testator executed the will is only entitled to ah intestate share of the estate unless “[t]he will expresses the intention that it is to be effective notwithstanding any subsequent marriage[.]” Lee Paulson ensured his will would be effective after his marriage to Risovi by including the phrase “in anticipation of the upcoming marriage[.]” Other courts have also reached this conclusion when interpreting similar will provisions.
See Brown v. Cronic,
[¶ 11] The Article Six definition of “spouse” and references to Risovi as “my wife” and “my spouse” are descriptive terms and do not create a condition precedent. In
Neshem,
this Court held a devise was. not void simply because the devisee did not fit the description in the will.
Neshem,
B.
[¶ 12] Having determined the will is unambiguous, we turn to the Paul-son family’s argument that the antenuptial agreement was contemporaneously executed with the will, and therefore should be read with the will. Risovi responds that the two instruments should not be construed together because the will did not incorporate the antenuptial agreement by reference.
[¶ 13] The contemporaneous execution rule requires instruments related to the same transaction and executed at the same time to be read and construed together.
Nantt v. Puckett Energy Co.,
[¶ 14] In determining the applicability of the contemporaneous execution rule, other courts have held parol evidence is inadmissible to explain the terms of an unambiguous instrument, and extrinsic evidence may not be used to create an ambiguity.
See Westmoreland-LG&E Partners v. Virginia Elec. and Power Co.,
[¶ 15] In any event, an antenup-tial agreement does not necessarily govern the distribution of property if the parties never married because such an agreement is only effective upon marriage.
See
N.D.C.C. § 14-03.1-04. The antenuptial agreement signed by Lee Paulson and Ri-sovi recognized this limitation on the effect of the agreement by stating, “This Agreement shall become effective only on the solemnization of the parties’ marriage.” Conversely, a will may devise property to an individual even if the contemplated marriage did not take place.
See
discussion
supra
¶¶ 10-11. The district court did not err in declining to construe the two instruments together. Because the will is unambiguous, the district court also did not err by excluding extrinsic evidence.
See Neshem,
C.
[¶ 16] The Paulson family also argues N.D.C.C. § 30.1-10-05; part of the Uniform Probate Code as enacted in North Dakota, should bé interpreted to allow reformation of Lee Paulson’s will. The Paulson family acknowledges the statute was not raised before the district court, but argues the statute supplements the family’s argument that the district court should have allowed extrinsic evidence. If this Court determines the statute constitutes a new issue on appeal, the Paulson family requests application of the “plain' error” doctrine to allow consideration of the statute.
[¶ 17] This Court announced the “plain error” doctrine in paragraph one of the Syllabus of the Court in
Megarry Bros. v. City of St. Thomas,
[¶ 18] Section 30.1-10-05, N.D.C.C., states:
Reformation to correct mistakes. The court may reform the terms of a governing instrument, even if unambiguous, to conform the terms to the transferor’s intention if it is proved by clear and *482 convincing evidence that the transferor’s intent and the terms of the governing instrument were affected by a mistake of fact or law, whether in expression or inducement.
This statute went into effect on August 1, 2009. 2009 N.D. Sess. Laws ch. 288, § 28. Lee Paulson’s will was executed on June 26, 2009, and Lee Paulson passed away on July 15, 2009. The Paulson family asserts section 30.1-10-05 retroactively applies to the will, under: N.D.C.C. § 30.1-35-01(2)(b), which states:
Time of taking effect — Provisions for transition.
[[Image here]]
2. Except as provided elsewhere in this title, on the effective date of this title or any amendment to this title:
[[Image here]]
b. The title or amendment applies to any proceedings in court then pending or thereafter commenced regardless of the time of the death of decedent except to the extent that in the opinion of the court the former procedure should be made applicable in a particular case in the interest of justice or because of infeasibility of application of the procedure of this title.
The appropriate provision of N.D.C.C. § 30.1-35-01 to determine the applicability of the reformation statute to Lee Paulson’s will is section 30.1-35-01(2)(d), which provides:
d. An act done before the effective date in any proceeding and any accrued right is not impaired by this title or the amendment. If a right is acquired, extinguished, or barred upon the expiration of a prescribed period of time which has commenced to run by the provisions of any statute before the effective date, the provisions shall remain in force with respect to that right.
[¶ 19] This Court has not interpreted the meaning of “accrued right” within the context of this statute. Section 1-02-13, N.D.C.C., states, “Any provision in this code which is a part of a uniform statute must be so construed as to effectuate its general purpose to make uniform the law of those- states which enact it.” In applying this statute, we have stated, “We interpret uniform laws in a uniform manner, and we may seek guidance from decisions in other states which have interpreted similar provisions in a uniform law.”
Estate of Allmaras,
[¶20] Consistent with this interpretation, we determine “accrued right” as used in section 30.1-35-01(2)(d) includes rights that vested prior to the effective date of an amendment to N.D.C.C. tit. 30.1.
Compare Myaer v. Nodak Mutual Ins. Co.,
III.
[¶ 21] We affirm the district court orders.
*484 [For publication purposes, this page was intentionally left blank.]
