free rein
US /friː reɪn/
UK /friː reɪn/

1.
carta branca, total liberdade
complete freedom of action or decision
:
•
The manager gave his team free rein on the new project.
O gerente deu carta branca à sua equipe no novo projeto.
•
Artists were given free rein to express themselves.
Os artistas receberam carta branca para se expressar.