Under what condition can re-use of an animal occur?

The correct condition for re-use of an animal is when prior authorization has been obtained. This requirement is in place to ensure that ethical standards are upheld in animal research and that the welfare of the animals is prioritized. Obtaining prior authorization typically involves a thorough review of the intended research to assess whether the use of the animal is justified and whether appropriate measures are in place to ensure humane treatment.

This process helps to safeguard against unnecessary suffering and promotes responsible use of animals in research settings. Without such authorization, researchers may be violating ethical guidelines and regulations set forth by institutional review boards and animal care committees, which oversee animal research practices to ensure compliance with legal and ethical standards.