From the Document: "On May 1, 2019, Mexican President Andrés Manual López Obrador signed into law a labor reform bill aimed at enhancing Mexican worker rights by ensuring that workers can vote for their union representatives by secret ballot, establishing the right of workers to join the union of their choice and establishing independent labor courts to resolve disputes and register contracts, among other measures. Critics of Mexico's current labor system argue that the pre-reform laws enable corruption in that they allow employers to influence union elections and prevent workers from voting freely to elect union leaders. The reform bill passed the Mexican House of Representatives and Senate in April 2019. The labor legislation is a commitment under the proposed USMCA [U.S.-Mexico-Canada Agreement]."
CRS Insight, IN11123
Congressional Research Service: https://crsreports.congress.gov/