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Mexico to Publish 40-Hour Workweek Decree as Argentina’s Unions Take Milei’s Labor Law to Court

Regional labor policy now diverges, pitting Mexico’s phased 40‑hour limit with digital oversight against Argentina’s deregulation facing court challenges.

Overview

  • Mexico’s president said the constitutional reform will be published Tuesday in the Diario Oficial, starting a phased cut from 48 hours to 46 in 2027, 44 in 2028, 42 in 2029 and 40 in 2030.
  • The Mexican change preserves salaries and statutory benefits, keeps the eight-hour day, triggers overtime from the 41st hour, guarantees two weekly rest days for eight-hour schedules at full rollout, and bans overtime for minors.
  • Mexico’s Labor Ministry will mandate an electronic hours registry, align secondary law and step up inspections to enforce the new weekly cap.
  • Argentina’s Congress approved a labor overhaul that allows up to 12-hour days via banks of hours, reduces severance with fund options and installment payments, permits pay in foreign currency or in kind, fragments vacations and sets minimum service quotas during strikes, with priority for firm-level deals and repeal of the journalist statute.
  • Argentina’s main union confederation (CGT) is filing court challenges citing the constitutional non-regressivity principle, as legal experts predict a surge in litigation that could reach the Supreme Court.