Mandatory, Permissive and Illegal Subjects of Bargaining
The category a proposal falls into decides more than whether it must be discussed. It decides whether a party may hold up an entire agreement over it, strike over it, or be found to have violated the Act simply by refusing to move.
The rule in short
Section 8(d) makes wages, hours and other terms and conditions of employment the mandatory subjects of bargaining. A party must bargain over a mandatory subject on request and may insist on its position to impasse. A permissive subject may be proposed but never made a condition of agreement, and insistence to impasse on one is itself a refusal to bargain. An illegal subject may not be agreed to at all, and a clause containing one is unenforceable however freely it was accepted.
Every proposal on a bargaining table belongs to one of three categories, and the category is fixed by law rather than by the parties. Mandatory subjects must be bargained on request. Permissive subjects may be raised and dropped. Illegal subjects may not be agreed to at all. Misfiling a proposal is one of the few ways a party can lose a bargaining case while genuinely trying to reach agreement.
Where the line comes from
Section 8(d) describes the obligation as bargaining over wages, hours and other terms and conditions of employment. The Supreme Court read that phrase as marking the outer edge of what either side may compel, and held that a party which insists to impasse on anything outside it has refused to bargain, even though the proposal itself was perfectly lawful. Nothing in the statute forbids proposing a permissive term. What is forbidden is conditioning agreement on one.
The mandatory category in practice
Wages reach far beyond hourly rates: incentive plans, shift differentials, bonuses with a pattern behind them, pensions, insurance, and paid leave are all inside. Hours reach scheduling, overtime distribution and rest periods. Terms and conditions reach seniority, layoff and recall, discipline and discharge, work rules, safety practices, the grievance procedure, and testing requirements applied to current employees.
Subcontracting of unit work is mandatory where the employer substitutes outside workers for unit employees to do the same work under similar conditions, because that is a change in the terms of employment rather than a change in the business. A contractor whose own subcontracting limits under a federal award constrain how much work it may pass along still owes the bargaining duty separately, and compliance with one regime is no answer to the other.
The decision, and the effects of the decision
Some management choices sit outside the mandatory category even though employees feel them acutely. A decision to close part of a business for reasons unrelated to labor costs, taken at the core of entrepreneurial control, is not itself a mandatory subject, because the burden of bargaining over it outweighs any likely benefit to the bargaining process. Relocation and changes in the scope and direction of the enterprise are analyzed the same way, and the results turn on whether labor costs were the motive and whether concessions could have changed the outcome.
This is the most commonly missed rule in the whole area. An employer entitled to make a decision without bargaining still owes bargaining over the consequences for unit employees: severance, notice, transfer rights, recall, insurance continuation, the order of separation. The duty must be satisfied at a meaningful time, meaning while the union still has some leverage, not after the equipment is gone. A remedy for late effects bargaining commonly includes back pay running until the parties bargain or reach impasse.
What each category permits
| Category | Duty to bargain on request | May insist to impasse | Strike or lockout over it | Enforceable if agreed |
|---|---|---|---|---|
| Mandatory | Yes | Yes | Yes | Yes |
| Permissive | No; either side may decline to discuss | No; insistence is itself a violation | No | Yes, if voluntarily agreed |
| Illegal | No; the subject may not be agreed to | No; proposing it may violate the Act | No | No; the clause is void |
| Effects of a nonmandatory decision | Yes | Yes | Yes | Yes |
Permissive subjects and the trap inside them
Familiar permissive proposals include interest arbitration of future contract terms, the internal affairs and ratification procedures of the other party, a performance bond, the identity of the other side's negotiators, the benefits of already retired employees, and any redefinition of the certified bargaining unit. Each may be discussed. None may be made a condition of settlement.
The trap is that insistence is often unintentional. A negotiator who leaves a permissive item in the final package, refuses to sign without it, and lets the talks fail has committed a per se refusal to bargain even though every mandatory item was handled impeccably. That is why the categorization exercise belongs at the drafting stage rather than at the end, and why it interacts directly with the good faith standard and the law of impasse.
Subjects that cannot be agreed to
A closed shop requiring membership before hire is unlawful. An agreement requiring the employer to cease doing business with another person is prohibited by Section 8(e), subject to narrow provisos for the construction and garment industries. A clause requiring discrimination on a basis forbidden by other federal law is unlawful. A union security clause is unlawful in a state that has exercised its authority to forbid one, which is the subject of checkoff, union security and right-to-work statutes. Payments between an employer and a labor organization outside the exceptions in the statute are criminal, not merely void.
When a business changes hands, the categories travel with the unit rather than with the contract, and a buyer that must bargain under the successorship doctrine inherits the same three-part sorting exercise from the first meeting onward.
Points to carry away
- Mandatory subjects are wages, hours and other terms and conditions of employment.
- A party may lawfully insist on a mandatory subject to the point of impasse and may strike or lock out over it.
- A permissive subject may be proposed and agreed, but never made a condition of overall agreement.
- Insisting to impasse on a permissive subject is itself an unlawful refusal to bargain.
- An illegal subject cannot be lawfully agreed to, and the clause is void even with both signatures on it.
- Even where a management decision is not itself mandatory, the effects of that decision on employees are.
Questions readers ask
Is a proposal about retirees mandatory?
No. Retirees are not employees within the meaning of the Act, so their benefits are a permissive subject and neither side may insist on a proposal about them to impasse. A party may raise the subject, and the parties may agree on retiree benefits if both are willing. The consequence matters most in the other direction: because the subject is permissive, an employer that has agreed to retiree benefits in a prior contract is not obliged to bargain about changing them, and the dispute usually becomes a contract interpretation question instead.
Can a party withdraw agreement on a permissive subject late in bargaining?
Yes, and doing so is not bad faith by itself. Neither side is required to discuss a permissive subject at all, so either may drop it. Withdrawing an entire package of tentative agreements including mandatory items is different, and a pattern of retracting settled items is a standard indicator of surface bargaining. The safe practice is to make clear at the time whether a tentative agreement on a permissive item is contingent, since a withdrawal that surprises the other side reads worse in a record than one that was flagged.
What happens to a clause that turns out to be illegal?
It is unenforceable, and the rest of the agreement generally survives. Neither party can compel performance of an illegal term, an arbitrator has no authority to enforce one, and a court asked to confirm an award resting on it will refuse. Because the parties cannot cure the defect by consent, the usual result is that the clause is treated as excised and the parties bargain a replacement. Where the clause is a union security provision displaced by state law, the remainder of the agreement is unaffected.
Sources
- Cornell Legal Information Institute — 29 U.S.C. 158, Unfair labor practicesThe 8(d) definition of the subjects of bargaining, the 8(e) hot cargo prohibition and its provisos.
- Cornell Legal Information Institute — 29 U.S.C. 157, Right of employees as to organization and collective bargainingThe Section 7 rights that limit what a contract may lawfully require of employees.
- Cornell Legal Information Institute — 29 U.S.C. 164, Construction of provisionsSection 14(b), which lets state law forbid agreements requiring membership as a condition of employment.
- Cornell Legal Information Institute — 29 U.S.C. 186, Restrictions on financial transactionsThe limits on payments between employers and labor organizations that make some proposals unlawful.
- eCFR — 29 CFR Part 102, Rules and Regulations, Series 8The procedure by which an insistence-to-impasse allegation is tried.
- National Labor Relations Board — National Labor Relations ActThe statutory text as the agency publishes it, section by section.
Lawwise is a publication, not a law firm. This article states general rules and cites its sources; it is not advice about any particular case, and the law differs by state and changes over time.
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