With the imminent enforcement of the so-called "Yellow Envelope Law"—the amended Labor Union and Labor Relations Adjustment Act—on March 10, 2026, South Korea stands on the brink of a significant shift in its labor-management landscape. The law, which has sparked both hope and apprehension among workers, unions, and employers, aims to rebalance the scales of collective bargaining and labor rights. Yet, as the clock ticks down to implementation, experts and stakeholders are bracing for a wave of new disputes, legal ambiguities, and perhaps even unintended consequences.
At the heart of the debate is the expanded definition of "user status" for primary contractors. According to the amendments, a company can be recognized as a "user"—and therefore bear collective bargaining responsibilities—if it has the substantial and concrete power to control the working conditions of subcontracted workers, even in the absence of a direct labor contract. This nuanced but powerful change has already triggered legal wrangling. A high-profile case involving HD Hyundai Heavy Industries and its subcontracted workers, who are demanding collective bargaining rights from the primary company, now awaits a landmark ruling at the Supreme Court, expected later in 2026. As reported by Asia Economy, courts and labor commissions have so far focused on whether subcontracted workers' duties are essential to the primary contractor’s business, as well as the degree of control exerted by the primary company and the structural relationship between the two entities.
Yet, the application of these criteria has been anything but consistent. For example, courts have sometimes recognized the primary contractor's user status in cases involving delivery drivers, citing the company’s influence over work methods and operations. In contrast, a 2019 case saw the National Labor Relations Commission reject a request for collective bargaining by the Metal Workers' Union against nine major primary manufacturers, including Hyundai and Kia, arguing that such obligations are limited to direct contractual relationships. As a research fellow at the Korea Labor Institute told Asia Economy, "The key benchmarks will be the structure of price determination by the primary contractor, the system of work instructions, and the extent of involvement in workforce management."
The law also introduces new limitations on damage claims related to labor disputes—a move that has drawn sharp reactions from both employers and unions. Historically, companies have filed massive lawsuits against unions and individual workers for damages incurred during strikes and protests, often leading to financial ruin for those involved. The amendments now restrict such claims to cases involving violence or destruction, and specify that, even when liability is found, compensation should be apportioned based on individual responsibility rather than collective union membership. This is intended to prevent situations in which a single worker is saddled with disproportionate financial liability simply for participating in collective action.
Nonetheless, the precise boundaries of "justifiable" industrial action remain legally murky. How much production loss or business disruption is protected? What about workplace occupations or obstruction of operations? These questions, as Asia Economy notes, are likely to be fiercely contested in courtrooms and negotiation tables alike. Business groups warn that the new limits could embolden unions and lead to more frequent strikes. "If the scope of damage claim limitations is unclear, it increases uncertainty for companies," a representative of the Korea Employers Federation told Asia Economy. On the other side, labor advocates argue that the changes are a critical safeguard. The Korean Confederation of Trade Unions (KCTU) described the law as "the minimum device to prevent excessive damage lawsuits from suppressing union activities."
Perhaps the most sweeping change is the expansion of what constitutes a legitimate subject of labor dispute. Traditionally, strikes and negotiations have centered on wages, working hours, and other direct working conditions. Under the revised law, however, business management decisions—such as restructuring, mergers, or workforce reductions—that affect employment conditions may now be grounds for collective action. For instance, if a company plans to relocate a factory or downsize a production line, unions could argue this directly impacts job security and working conditions, thereby justifying a strike. The government has sought to clarify, through official guidelines, that only structural reassignments tied to restructuring—not routine personnel transfers—qualify as legitimate triggers for labor disputes. Still, as industries like petrochemicals undergo large-scale restructuring, many expect labor conflicts to intensify.
Kim Sung-hee, director of the Industrial Labor Policy Research Institute and former professor at Korea University’s Labor Studies Institute, explained to Asia Economy, "Restructuring is most directly connected to workers’ conditions. The central issue will be how to balance constitutional property rights with the three basic labor rights." This tension is likely to play out in real time as companies and unions test the law’s boundaries.
But the complexity does not end there. As outlined by JoongAng Ilbo, the Ministry of Employment and Labor issued interpretive guidelines on March 8, 2026, stating that primary and subcontractor unions will generally form separate negotiation channels. This means that primary companies will need to negotiate with both their own unions and those representing subcontracted workers. The prospect of divided resources has already sown discord. If, for example, subcontracted workers win higher wages, primary workers may see their own share of company benefits shrink—a scenario that played out in February 2026 when the regular union at Korea Electric Power Corporation KPS opposed the government’s plan to directly employ about 600 subcontracted workers.
Fragmentation is not limited to the divide between primary and subcontractor unions. Within the ranks of subcontracted workers, differences in working conditions, employment types, and union affiliations could lead to further splintering. Kim Deok-ho, adjunct professor at Sungkyunkwan University and former standing member of the Economic, Social, and Labor Council, warned JoongAng Ilbo that "the requirements for splitting bargaining units are so simple that negotiations could become almost individualized." This could see unions competing for members and bargaining power, complicating the collective process even further.
There is also a risk that subcontractor companies—who hold the direct employment contracts—might be sidelined in negotiations between primary contractors and unions. As Professor Lee Jeong of Hankuk University of Foreign Studies Law School told JoongAng Ilbo, "If the primary contractor promises wage increases or bonuses for subcontracted workers without providing additional funds to the subcontractor, the latter may be forced to comply under pressure, even if it means financial strain."
Against this backdrop of legal and organizational uncertainty, labor activism continues to surge. On October 2, 2025, members of the Korean Public Transport Union gathered outside Incheon International Airport’s Terminal 1 for a pre-strike rally, demanding increased staffing and reduced working hours—a vivid illustration of the heightened tensions as the law’s implementation approaches.
As South Korea prepares for the Yellow Envelope Law to take effect, the nation’s labor landscape is set for a period of adjustment, challenge, and perhaps transformation. Whether the law will deliver on its promise of fairer labor relations, or unleash a new era of disputes and divisions, remains an open—and closely watched—question.