Final answer:
Embalming may be done without approval in certain circumstances, such as when there are public health or safety concerns or for forensic investigation purposes.
Step-by-step explanation:
Embalming may be done without approval when there are specific circumstances or requirements. For example, if a body is a threat to public health or safety, embalming may be carried out without approval. Additionally, in some cases of forensic investigation or research, embalming may be necessary without prior consent. However, it is important to note that embalming should generally be done with the appropriate authorization and in accordance with legal and ethical guidelines.