UBE Choice of Law: Contract

Last updated: May 2, 2026

Choice of Law: Contract questions are one of the highest-leverage areas to study for the UBE. This guide breaks down the rule, the elements you need to recognize, the named traps that catch most students, and a memory aid that scales to test day. Read it once, then practice the same sub-topic adaptively in the app.

The rule

When a contract dispute crosses state lines, the forum court applies its own choice-of-law methodology to pick the substantive law that governs the contract. The three tested approaches are (1) the traditional First Restatement vested-rights rule — the law of the place of contracting (lex loci contractus) governs validity/formation, and the law of the place of performance governs performance issues; (2) the modern Restatement (Second) of Conflict of Laws §188 — the law of the state with the 'most significant relationship' to the transaction and parties governs, evaluated through the §6 policy factors and §188(2) contacts; and (3) party autonomy under Restatement (Second) §187 and UCC §1-301 — a contractual choice-of-law clause is enforced unless the chosen state has no substantial relationship and no other reasonable basis exists, or applying the chosen law would violate a fundamental public policy of a state with a materially greater interest whose law would otherwise govern under §188.

Elements breakdown

First Restatement — Vested Rights (Traditional Approach)

A minority of states still apply the territorial rule that the place where the legally significant act occurred determines which state's law governs.

  • Identify the issue: validity/formation versus performance
  • For validity/formation: apply lex loci contractus (place of contracting)
  • Place of contracting = where the last act necessary to form the contract occurred
  • For performance: apply lex loci solutionis (place of performance)
  • No balancing of interests; rule is mechanical and territorial

Common examples:

  • Offer mailed from State A, acceptance mailed from State B → mailbox rule places contracting in State B
  • Goods to be delivered in State C → State C law governs delivery disputes

Restatement (Second) §188 — Most Significant Relationship (Majority)

In the absence of an effective choice-of-law clause, the law of the state with the most significant relationship to the transaction and the parties governs the contract.

  • Apply §6 policy factors (forum interests, justified expectations, predictability, ease of application)
  • Weigh §188(2) contacts: place of contracting
  • Place of negotiation of the contract
  • Place of performance
  • Location of the subject matter of the contract
  • Domicile/residence/place of incorporation/business of the parties
  • Contacts evaluated according to their relative importance to the issue

Restatement (Second) §187 — Party Autonomy (Choice-of-Law Clause)

A contractual choice-of-law clause governs unless one of two narrow exceptions applies, allowing parties to select the governing law in advance.

  • Parties expressly chose law of a particular state in the contract
  • Chosen state has substantial relationship to parties or transaction OR other reasonable basis for the choice
  • Application of chosen law would not violate fundamental public policy
  • Of a state with materially greater interest in the issue
  • That would be the §188 governing state absent the clause
  • Issue is one parties could have resolved by explicit contract provision (for §187(1) issues, no policy limit applies)

UCC §1-301 — Choice of Law for Sale of Goods

For transactions in goods, parties may choose the law of any state bearing a reasonable relation to the transaction; absent a clause, UCC applies if the transaction bears an appropriate relation to the forum.

  • Transaction must be one in goods (UCC Article 2 applies)
  • Parties' choice enforced if chosen state bears reasonable relation to transaction
  • Absent choice, forum applies its own UCC if transaction bears appropriate relation
  • Choice cannot displace mandatory consumer protection rules of consumer's home state

Public Policy Exception (Escape Device)

A forum court will refuse to apply otherwise-governing foreign law when doing so would violate a fundamental public policy of the forum or another state with a materially greater interest.

  • Forum or interested state has fundamental public policy at stake
  • Policy must be fundamental, not merely different from forum's law
  • Applying chosen/foreign law would seriously offend that policy
  • Interested state has materially greater interest than the chosen state
  • Policy typically protects weaker parties (consumers, employees, franchisees)

Common examples:

  • Non-compete unenforceable under California policy despite Delaware choice-of-law clause
  • Usury cap protecting consumers despite out-of-state lender choice

Renvoi (Generally Rejected in Contract)

In contract choice-of-law, the forum applies the chosen state's internal/substantive law, not its choice-of-law rules, avoiding the circular renvoi problem.

  • Choice of 'law of State X' means State X's internal substantive law
  • Does not include State X's choice-of-law rules
  • Exception: where parties clearly intend the whole law including conflicts rules
  • Restatement (Second) §187 cmt. h confirms the no-renvoi default

Common patterns and traps

The Clause-First Trigger

Whenever a contract dispute hits your desk, your first move is to scan for a choice-of-law clause. If one exists, you are in §187 (or UCC §1-301 for goods) — full stop. Examiners reward candidates who explicitly say 'because the contract contains a choice-of-law clause, I begin with §187' before doing any contacts analysis.

A wrong choice will apply the §188 most-significant-relationship test even though the contract clearly contains a clause selecting Delaware law; the right answer enforces the clause unless the §187(2)(b) public-policy escape applies.

The Substantial-Relationship vs Materially-Greater-Interest Confusion

§187 uses two different standards at two different steps. Step one: does the chosen state have a 'substantial relationship' to the parties or transaction (a low bar — incorporation, principal place of business, place of performance all qualify)? Step two: does the public-policy exception apply, which requires the OTHER state to have a 'materially greater interest' AND a fundamental policy that would be offended? Distractors swap these standards.

A wrong choice says the clause fails because Delaware lacks a 'materially greater interest' than California — but materially-greater-interest is the standard for the public-policy escape, not for the threshold validity of the choice.

The Goods vs Services Choice-of-Law Split

Sale-of-goods contracts trigger UCC §1-301, which uses a 'reasonable relation' test that is somewhat more permissive than §187's 'substantial relationship' standard. Common-law service or real-estate contracts use Restatement (Second) §187. Failing to identify whether Article 2 applies misroutes the entire analysis.

A wrong choice applies §187's substantial-relationship test to a contract for the sale of industrial machinery between merchants in different states; the right answer applies UCC §1-301.

The Lex-Loci Holdout Distractor

A handful of jurisdictions (e.g., a notable minority including some southeastern states) still apply the First Restatement vested-rights approach. On the MEE, if facts emphasize the forum is one of these holdouts, the answer pivots on lex loci contractus for formation and lex loci solutionis for performance — splitting the contract issues by location. Don't reflexively apply §188 to every fact pattern.

A wrong choice applies §188's contacts test even though the question expressly states the forum follows the First Restatement; the right answer mechanically applies the place where the last act of formation occurred.

The Public-Policy Override Mirage

Candidates routinely overuse the public-policy escape. The escape requires (a) a state with a materially greater interest under §188 than the chosen state, AND (b) a FUNDAMENTAL public policy of that state, AND (c) that applying the chosen law would seriously offend it. Mere differences in law (e.g., one state allows recovery the other doesn't) are not enough — the policy must be of the kind protecting weaker parties or core regulatory interests.

A wrong choice voids a Delaware choice-of-law clause merely because the forum's contract-damages rules differ; the right answer enforces the clause because no fundamental policy is at stake.

How it works

Walk through choice-of-law in contract in three moves. First, ask: is there a choice-of-law clause? If yes, you're in §187/UCC §1-301 territory — the clause is presumptively enforced and you only override it under the narrow public-policy exception requiring (a) a state with a materially greater interest under §188, (b) a fundamental policy of that state, and (c) that the chosen law would seriously offend it. Second, if there is no clause, ask which methodology the forum follows: a handful of states still use the First Restatement (lex loci contractus for formation, lex loci solutionis for performance), but the majority and the MEE-default approach is Restatement (Second) §188 — count the five contacts and weigh them against the §6 policy factors. Third, watch for the goods/services trigger: if it's a goods contract, you're in UCC §1-301, which has a slightly more permissive 'reasonable relation' standard than §187's 'substantial relationship' test. The single biggest mistake is leaping to the §188 contacts analysis when there's a choice-of-law clause sitting in the contract — always check for the clause first.

Worked examples

Worked Example 1

Which state's substantive contract law will the court most likely apply?

  • A Delaware law, because the parties' contractual choice-of-law clause is presumptively enforceable.
  • B Delaware law, because Delaware has the most significant relationship to the transaction under §188.
  • C Texas law, because the goods were manufactured in Texas and Texas has a substantial relationship to the contract.
  • D Nevada law, because the chosen state lacks a substantial relationship to the parties or transaction and no other reasonable basis supports the choice. ✓ Correct

Why D is correct: Under Restatement (Second) §187(2)(a), a choice-of-law clause is unenforceable if the chosen state has no substantial relationship to the parties or transaction AND there is no other reasonable basis for the parties' choice. Here, Delaware has zero contacts — no incorporation, no performance, no negotiation, no offices — and the facts give no other reasonable basis (such as Delaware being a neutral commercial law forum the parties strategically selected). The court therefore disregards the clause and applies §188; under those contacts (Texas manufacture/Reyes domicile and Nevada delivery/Patel domicile/place of signing), Nevada as the forum and place of final acceptance has a strong claim, but the key point is that Delaware law is rejected.

Why each wrong choice fails:

  • A: This skips the §187(2)(a) threshold inquiry. Choice-of-law clauses are not automatically enforced — the chosen state must have a substantial relationship or the parties must have another reasonable basis for the selection. Delaware has neither here. (The Clause-First Trigger)
  • B: Delaware has no §188 contacts at all — it is not the place of contracting, negotiation, performance, subject matter, or any party's domicile. §188 cannot rescue a defective choice-of-law clause when the chosen state has no relationship to the deal. (The Substantial-Relationship vs Materially-Greater-Interest Confusion)
  • C: While Texas has a substantial relationship, this answer assumes Texas wins the §188 weighing without addressing the substantial Nevada contacts (place of signing by acceptor, Patel's domicile, place of delivery). The §188 weighing is fact-intensive and does not automatically favor the manufacturing state.
Worked Example 2

Will the California court most likely enforce the Washington choice-of-law clause and the non-compete?

  • A Yes, because Washington has a substantial relationship to the transaction as Cascade's headquarters.
  • B Yes, because parties to an employment contract have broad autonomy to select governing law under §187.
  • C No, because California has a materially greater interest than Washington and applying Washington law would violate California's fundamental public policy against employee non-competes. ✓ Correct
  • D No, because under the First Restatement vested-rights approach the place of performance (California) governs the enforceability of the covenant.

Why C is correct: This is the textbook §187(2)(b) public-policy override. The threshold §187(2)(a) test is satisfied — Washington has a substantial relationship as Cascade's headquarters. But the override applies because (1) absent the clause, §188 would point to California (Liu's domicile, place of performance, and place where the post-termination effects fall); (2) California's §16600 is precisely the kind of fundamental, weaker-party-protective policy §187(2)(b) protects; and (3) enforcing Washington law would directly contradict that policy. Courts have repeatedly applied this analysis to invalidate non-California choice-of-law clauses in employment non-competes.

Why each wrong choice fails:

  • A: This answer correctly identifies that Washington passes the §187(2)(a) threshold but stops there. It misses the §187(2)(b) override, which is the entire point of the question — substantial relationship is necessary but not sufficient when a fundamental public policy of a materially greater-interest state is at stake. (The Substantial-Relationship vs Materially-Greater-Interest Confusion)
  • B: §187 autonomy is not unlimited; the public-policy escape under §187(2)(b) is the exception, and employment non-competes against weaker-party employees are the paradigm case for triggering it. Calling autonomy 'broad' overstates the rule. (The Public-Policy Override Mirage)
  • D: California follows the Restatement (Second), not the First Restatement vested-rights approach. While the outcome (California law) is the same, the reasoning is wrong — and on the MEE, the reasoning is what gets graded. (The Lex-Loci Holdout Distractor)
Worked Example 3

Which body of law and methodology will the Iowa court most likely apply to determine the substantive warranty rules?

  • A Iowa common law of contracts under Restatement (Second) §188, because Iowa is the forum and place where the goods were used.
  • B Article 2 of the UCC, with the §188 most-significant-relationship test selecting between Iowa's and Arizona's enactments. ✓ Correct
  • C Arizona law under lex loci contractus, because acceptance occurred at Marquez's Arizona office and that is where the contract was formed.
  • D Federal common law of sales, because the transaction crosses state lines and involves a substantial sum.

Why B is correct: This is a contract for the sale of goods, so UCC Article 2 applies — not common-law contract doctrine. Because both Iowa and Arizona have enacted Article 2, the choice-of-law question is which state's enactment (and any non-uniform amendments or case-law gloss) governs. With no choice-of-law clause, Iowa as the forum applies the Restatement (Second) §188 contacts: place of contracting (Arizona, where acceptance occurred), place of negotiation (split), place of performance/delivery (Arizona F.O.B. point), location of subject matter on use (Iowa), and parties' domiciles (Iowa and Arizona). The §188 weighing — not lex loci or federal common law — selects between the two states' Article 2 enactments.

Why each wrong choice fails:

  • A: This answer correctly identifies §188 as the methodology but misclassifies the transaction as common-law contracts. A sale of irrigation equipment is unquestionably a sale of goods governed by UCC Article 2. (The Goods vs Services Choice-of-Law Split)
  • C: Iowa follows the Restatement (Second), not the First Restatement vested-rights approach. Even though acceptance in Arizona is one §188 contact (place of contracting), the answer mechanically applies lex loci contractus instead of the §188 weighing methodology Iowa actually uses. (The Lex-Loci Holdout Distractor)
  • D: There is no federal common law of sales for ordinary commercial transactions between private parties — the Erie doctrine forecloses it in diversity, and state-enacted UCC Article 2 governs. This invents a body of law that does not exist for these facts.

Memory aid

CCC-PUMP: First check the Choice-of-law Clause. If yes → §187 (Substantial relationship + no fundamental Public policy violation). If no → §188 contacts (Place of contracting, Negotiation, Performance, Subject matter, Domicile) weighed under §6 factors. UCC §1-301 for goods uses a looser 'reasonable relation' Met-test.

Key distinction

The decisive split is clause vs. no-clause: with a choice-of-law clause, the analysis runs through §187 and the burden is on the party resisting the clause to prove a §187(2)(b) public-policy override; without a clause, the analysis runs through §188 and the court neutrally weighs contacts. Confusing these two frameworks — especially applying §188 contacts to defeat an express clause — is the most common essay-killing error.

Summary

In contract choice of law, always check for a choice-of-law clause first (§187/UCC §1-301), and only if none exists apply the forum's default methodology — §188's most-significant-relationship test in the majority of states, or the older lex loci contractus/solutionis rule in First Restatement holdouts.

Practice choice of law: contract adaptively

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Frequently asked questions

What is choice of law: contract on the UBE?

When a contract dispute crosses state lines, the forum court applies its own choice-of-law methodology to pick the substantive law that governs the contract. The three tested approaches are (1) the traditional First Restatement vested-rights rule — the law of the place of contracting (lex loci contractus) governs validity/formation, and the law of the place of performance governs performance issues; (2) the modern Restatement (Second) of Conflict of Laws §188 — the law of the state with the 'most significant relationship' to the transaction and parties governs, evaluated through the §6 policy factors and §188(2) contacts; and (3) party autonomy under Restatement (Second) §187 and UCC §1-301 — a contractual choice-of-law clause is enforced unless the chosen state has no substantial relationship and no other reasonable basis exists, or applying the chosen law would violate a fundamental public policy of a state with a materially greater interest whose law would otherwise govern under §188.

How do I practice choice of law: contract questions?

The fastest way to improve on choice of law: contract is targeted, adaptive practice — working questions that focus on your specific weak spots within this sub-topic, getting immediate feedback, and revisiting items you missed on a spaced-repetition schedule. Neureto's adaptive engine does this automatically across the UBE; start a free 7-day trial to see your sub-topic mastery climb in real time.

What's the most important distinction to remember for choice of law: contract?

The decisive split is clause vs. no-clause: with a choice-of-law clause, the analysis runs through §187 and the burden is on the party resisting the clause to prove a §187(2)(b) public-policy override; without a clause, the analysis runs through §188 and the court neutrally weighs contacts. Confusing these two frameworks — especially applying §188 contacts to defeat an express clause — is the most common essay-killing error.

Is there a memory aid for choice of law: contract questions?

CCC-PUMP: First check the Choice-of-law Clause. If yes → §187 (Substantial relationship + no fundamental Public policy violation). If no → §188 contacts (Place of contracting, Negotiation, Performance, Subject matter, Domicile) weighed under §6 factors. UCC §1-301 for goods uses a looser 'reasonable relation' Met-test.

What's a common trap on choice of law: contract questions?

Skipping the choice-of-law clause and jumping to §188 contacts

What's a common trap on choice of law: contract questions?

Confusing 'substantial relationship' (§187) with 'materially greater interest' (§187(2)(b))

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