ジョグジャカルタ原則
In 2006 Cabral participated in the production of the Yogyakarta Principles on the Application of Human Rights Legislation to Sexual Orientation and Gender Identity, and was one of the initial 29 signatories. He is also a drafting committee member and signatory of the Yogyakarta Principles plus 10, on the application of international human rights law in relation to sexual orientation, gender identity, gender expression and sex characteristics.