How long must a body received by an educational institution be held before it can be interred?

The requirement for holding a body received by an educational institution before interment is set at 30 days. This period allows educational institutions, particularly those involved in medical or mortuary science training, adequate time to utilize the body for educational purposes such as anatomy lessons or other academic study. After this 30-day period, if the body is no longer needed, the institution can proceed with interring the remains. This regulation is important to ensure that bodies are treated respectfully while also fostering educational opportunities within the field of mortuary science. The other timeframes provided do not align with this legal requirement, which is why they do not represent the correct answer.