The amendment, which passed the lower house in May, cuts the maximum work week from 44 to 40 hours for more than 30 million workers and bans six-day workweeks, which 16 million people currently work.
The Senate approved the reform with 75 votes in favour and just one against. The sole dissenting vote came from Hamilton Mourão, the former vice-president to Jair Bolsonaro, father of Lula’s runoff opponent, far-right senator Flávio Bolsonaro.
Flávio Bolsonaro spent months opposing the change but reversed course on Tuesday, saying “the majority of Brazilian workers” supported it, and joined the Senate majority. Lula had strongly championed the amendment as he seeks to overturn his opponent’s first-round lead.
The change is expected to affect mainly workers in retail, restaurants and hotels, most of them low paid, a group that Lula has lost the most support from since the 2022 election, when he defeated Jair Bolsonaro.