What it is
The “Yellow Envelope Act” is the popular name for a set of amendments to South Korea’s Trade Union and Labor Relations Adjustment Act. It does two main things. First, it broadens the legal definition of “employer” so that a principal company — not just the subcontractor that directly signs a worker’s contract — can be treated as the employer if it “substantially and specifically” controls that worker’s conditions. Second, it limits the damages that companies can claim against unions and individual workers for losses tied to industrial action, a practice that had become a favored tool for suppressing strikes.
The nickname traces to 2014, when members of the public mailed cash donations in yellow envelopes to SsangYong Motor workers who had been ordered by a court to pay the company roughly 4.7 billion won in damages stemming from a 2009 strike. The campaign turned a single damages case into a durable symbol of how large damages claims can be used to deter unionization and strike activity, particularly among subcontracted and non-standard workers who sit outside a direct employment relationship with the company that actually directs their work.
Progressive lawmakers first proposed the bill in 2015. It repeatedly stalled against opposition from business groups and conservative parties, and even after passing South Korea’s Democratic Party-controlled National Assembly in 2023 and 2024, it was vetoed twice by then-President Yoon Suk Yeol. Following Yoon’s removal from office, the Assembly passed the bill again on August 24, 2025, by a vote of 183 to 3. It took effect on March 10, 2026, after a six-month grace period.
Why it matters for AI governance and narratives
The Act does not mention artificial intelligence, but it lands squarely inside a fight that AI is intensifying: who is accountable for conditions of work when the entity directing labor is legally and organizationally distant from the people doing it. Platform and gig work — delivery drivers, content moderators, data-labeling workers, warehouse staff managed by algorithmic scheduling — routinely separates the company that benefits from the work from the company that nominally employs the worker. As AI systems increasingly mediate or displace labor in these settings, the question the Yellow Envelope Act answers for Korean subcontractors (can the real controller of working conditions be held liable as an employer?) is the same question regulators elsewhere are beginning to ask about AI-mediated and platform-structured labor markets.
For the observatory’s purposes, the Act is also a case study in how labor narratives interact with AI narratives by proximity rather than direct reference. Much AI governance coverage frames automation’s effects on labor in the abstract — job displacement statistics, productivity forecasts — while the concrete legal fights over who counts as an employer, who bears liability, and who can organize are happening in adjacent, non-AI-specific labor law. When an AI observatory’s labor desk cites a story like the Arisell sentencing or subcontractor strikes without surfacing this legal backdrop, it risks treating labor unrest as background noise rather than as the institutional terrain on which AI-era labor questions will actually be contested and resolved.
Key facts and dates
- 2009: SsangYong Motor workers strike; courts later order workers to pay the company substantial damages.
- 2014: Public donates cash in yellow envelopes to help affected workers pay the damages, giving the reform movement its name.
- 2015: Bill first proposed in the National Assembly.
- 2023–2024: Bill passes the Assembly twice; President Yoon Suk Yeol vetoes it both times.
- August 24, 2025: Assembly passes the amendment 183–3.
- March 10, 2026: The law takes effect after a six-month grace period.
- First days of effect: Within 48 hours, 453 subcontractor unions and union branches at 248 principal-contractor workplaces filed bargaining requests, involving roughly 98,480 union members — an early signal of the scale of pent-up subcontractor organizing the law unlocks.
- Ongoing dispute: Businesses argue the “substantial control” standard for determining employer status is too vague, and administrative guidance alone has not resolved the resulting uncertainty.
Where to learn more
- South Korea: Landmark labour law reform — ‘Yellow Envelope Law’ curtails corporate damages claims against unions — Business & Human Rights Resource Centre summary with primary provisions.
- Pro-labor ‘yellow envelope bill’ scrapped in revote after Yoon’s veto — The Korea Times, on the 2023 veto and legislative history.
- South Korea’s Yellow Envelope Act: what employers need to know — Ius Laboris legal analysis of the employer-definition and damages provisions.
- ‘Yellow envelope law’ at 1 month: bargaining expands, but not to ‘thousands’ — The Korea Times, on early implementation data.