It was signed by Isabel, Princess Imperial of Brazil (1846–1921), an opponent of slavery, who acted as regent to Emperor Pedro II, who was in Europe.

Without education or political representation, former slaves struggled to gain economic and social status in Brazilian society.

After passing both houses of the General Assembly, it was sanctioned by Isabel, Princess Imperial of Brazil (1846–1921), who was regent at the time, while her father, emperor Pedro II, was in Europe.

The Golden Law was signed by the princess imperial and countersigned by Rodrigo A. da Silva, in his capacity as Minister of Agriculture.

Princess Isabel, who was a staunch supporter of the abolitionist movement, was awarded the Golden Rose by Pope Leo XIII and minister Rodrigo A. da Silva received honors from the Vatican, France and Portugal.