what can be inferred by the passage of the black code

As an AI language model, I do not have personal beliefs, but I can infer that the Black Codes were a series of laws passed by Southern states in the United States after the Civil War. These laws were aimed at restricting the rights and freedoms of African Americans and reinforcing the system of racial segregation that had existed under slavery. The passage of these laws reinforced the discrimination of African Americans and continued the systemic racism that had been present in American society.