According to the PHS policy, any building, room, or area used for confinement, transport, or experiments including surgery is considered an animal facility if the animals are maintained there for more than ______ hours.

The definition of an animal facility under PHS policy is critical for compliance and regulatory oversight. According to the Public Health Service (PHS) policy, any space where animals are housed, transported, or subjected to experiments, including surgical procedures, qualifies as an animal facility if the animals are maintained there for more than 24 hours. This duration is significant because it establishes a threshold for regulatory requirements, ensuring that appropriate care, oversight, and humane treatment practices are implemented.

Recognizing this timeframe helps institutions align their practices with PHS standards. It ensures that facilities are equipped with necessary permits and procedures designed to maintain animal welfare and comply with ethical guidelines in research. By understanding that the 24-hour rule delineates when spaces must adhere to more rigorous facility regulations, those involved in IACUC administration can ensure adherence to policies that promote the humane treatment and welfare of research animals.