Final answer:
The Planning function handles mutual aid agreements, while the Operations Section supervises tactical response resources in the Incident Command System.
Explanation:
Documentation of mutual aid agreements falls under the responsibility of the Planning function in the Incident Command System. This function ensures proper documentation and coordination of resources among different agencies during incidents.
The Operations Section is in charge of organizing, assigning, and supervising tactical response resources to effectively manage the incident's on-ground activities and achieve incident objectives.
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