3. Mutual aid emergency agreements must be prearranged and duly authorized. A sample of a letter of agreement s included in of this Appendix. The airport authority may have to act as co-ordinating agency if more Figure 5-1 complicated jurisdictional or multi-agency agreements are necessary. Paragraphs and 5 this contain guidelines compiled to assist the preparation of mutual aid emergency agreements with local fire departments for accidents occurring on and off the airport