(4) STATE PLAN.-The office shall develop, maintain, and implement appropriate modifications for a statewide emergency communications E911 system plan. The plan shall provide for:
(a) The public agency emergency communications requirements for each entity of local government in the state.
(b) A system to meet specific local government requirements. Such system shall include law enforcement, firefighting, and emergency medical services and may include other emergency services such as poison control, suicide prevention, and emergency management services.
(c) Identification of the mutual aid agreements necessary to obtain an effective E911 system.
(d) A funding provision that identifies the cost necessary to implement the E911 system.
The office shall be responsible for the implementation and coordination of such plan. The office shall adopt any necessary rules and schedules related to public agencies for implementing and coordinating the plan, pursuant to chapter 120.