Type 4 incidents in emergency management are limited to one operational period, do not require a written action plan, involve command staff only if necessary, and need several single resources. This classification is essential for efficient incident response. Therefore, the correct answer to the question is Type 4. ;
The answer to the question about the incident type that is limited to one operational period without a required written action plan is Type 4. Type 4 incidents involve command staff only as needed and require several single resources. Thus, the correct choice is Type 4.
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