BRCC, the rules that govern work and rest times where I work, are too complicated to post here.
If you are a member of a union in Brazil, your union is most likely a member of the
ITF.
Via the ITF, your union can easily take contact with other member unions world wide to find out about the various rules in various countries. And the answers will be more comprehensive than anything you get here.
Good luck; itīs a fight worth fighting.