Answer:
The statement is true.
Step-by-step explanation:
The Incident Commander knows what resources are needed in case of a risky situation. It had rules about how to carry out the process to respond in the best way possible to the issue.
Following these rules allows the resources to be managed with care and distributed in an equal way in order to make use of them properly.
Sending resources which have not been requested puts the people at risk and it puts the whole operation at risk, given that they can be mishandled and could even lack for the occasion.