Which of the following is NOT a type of extradition code?

The correct answer is "retirement," as this term does not pertain to extradition codes. Extradition codes are legal frameworks that govern the process by which individuals charged with crimes can be transferred from one jurisdiction to another, typically when they have fled to avoid prosecution.

Detention refers to the holding of a suspect in custody during the extradition process. Extradition itself pertains to the formal request made to return a suspect to the state where the alleged crime occurred. "No extradition" signifies a situation where a jurisdiction refuses to return an individual, typically due to specific legal constraints or protections.

In contrast, "retirement" is not a legal term associated with the extradition process and does not relate to the movement or custody of individuals in the context of law enforcement. This distinction clarifies why "retirement" is not a type of extradition code.