An act that is ethical and legal: The act of non-discrimination on grounds of race, gender, disability, sexual orientation, etc. is ethical and via discriminatory legislation legal.

An act that is ethical but not legal: The act of euthanasia can be seen as ethical, yet in some countries such as the UK is illegal.

An act that is not ethical but is legal: Apartheid, segregation of blacks and whites in South African society, totally unethical yet was legal under white rule.

An act that is not ethical and not legal: Torture of political prisoners is unethical and illegal under UN Declaration of Human Rights.