追溯該法令之所以成型背後的一部分原因，應歸功於非營利性機構國際動物保護者協會（Animal Defenders International， ADI）臥底調查所搜集的證據。
另外，在卡車後面還發現三隻棕熊被關在只有2.5 × 3公尺（ 8.2 x9.8英尺）大的籠子裡。而他們唯一的運動就是來回馬戲團演出場地作短暫的表演。更離譜的是，當動物被指揮進行舞蹈、裝死、騎自行車等活動時，現場並沒有屏障保護觀眾的安全。
Bolivian President Evo Morales has signed the world's first law prohibiting the use of both wild and domestic animals in traveling circuses.
This is the first national law to ban the use of both domestic and wild animals in circuses. To date, Croatia, Singapore, Austria, Israel and Costa Rica have all banned wild animals in circuses. Similar bans on animal use in traveling circuses in Costa Rica, Finland and Denmark only prohibit the use of wild animals or certain species.
The Bolivian law, signed earlier this month, was tabled by Congresswoman Ximena Flores of Potosi. It is expected to be published shortly.
The law arose as a result of evidence gathered during an undercover investigation by the nonprofit Animal Defenders International.
Investigators found lions confined in a tiny cage on the back of a truck - two were pregnant but were forced to continue to perform. ADI videos show circus employees beating a lion in the circus ring with a baton and beating a caged lion with a metal pan. In one video, a caged lion was jerked by a chain around its neck by circus workers outside the cage, causing visible pain.
Three brown bears were kept in tiny compartments measuring just 2.5 x 3 meters (8.2 x 9.8 feet) inside a cage on the back of a truck. Their only exercise was the walk to and from the ring for their short performance. There were no safety barriers to protect the audience as the animals were made to dance, play dead and ride a bicycle.
Other ADI videos showed circus employees beating a wolf and a llama in the circus ring. The findings of the investigation were presented to the Bolivian Congress together with a report from Animal Defenders International on the scientific evidence of suffering of animals in traveling circuses, "The Science on Suffering."
The new law bans the use of wild and domestic animals in circuses in the Bolivia, as their conditions and confinement are considered acts of cruelty.
The circuses will be allowed one year to adapt their shows to a humans-only program and during this time, the government will issue regulations on confiscation and monetary sanctions for any breaches of the law.
With offices in London, San Francisco and Bogota, ADI campaigns to protect animals in entertainment, replacement of animals in experiments; worldwide traffic in endangered species; vegetarianism; factory farming; pollution and conservation. ADI also rescues animals in distress worldwide. The group's evidence has led to campaigns and legislative action to protect animals around the world.