“According to a solicitation for brain harvesting released Friday, the Pentagon’s medical school wants brains for dissection and study that must have been “properly donated to medical science,” USA Today reports.

Ideally, such brains can come from “a cadaver that has been diagnosed with cancer not affecting the head or neck, or any other anatomical structures below the clavicle,” which “shall be considered optimum specimens for brain harvesting.”

“Also, the solicitation says, brains must not carry anything that could cause any danger to the university’s students, such as Creutzfeldt-Jakob Disease or HIV. Each must be accompanied with a signed death certificate and documentation that it was properly donated to medical science.”