The Preamble tells of human rights violations because of sexual orientation and gender identity and explains what sexual orientation and gender identity are. The Principles affirm human rights, such as civil, political, economic, social and cultural rights, and demand the prohibition of all discrimination relating to those human rights. Principle 3 demands legal recognition of the sex change of transsexuals without any surgery, including sterilization and sexual reassignment surgery, because the each person's self-defined gender identity is seen as important for the autonomy and dignity of the person. But at the same time, the importance of the rights to undergo body modification on sexual reassignment surgery as a "non-discriminatory treatment" and other health cares without discrimination is emphasized, and must be provided even in prison. The Principles affirm protection by states against all human trafficking, homelessness and violence, hate crimes, harassment and bullying. They insist that it is important for society to respect the dignity and self-esteem of LGBT people against prejudice and to protect their right to education. The Principles also insist on the prevention of any medical abuse, including the case of the intersex children, and assert that any gender identity is not a disease. They also aim to promote human rights of any kind and say that States must protect LGBT activists from any violence, threat or discrimination against them. Principle 29 affirms that violations of human rights including on sexual orientation and gender identity must be punished.