Development and functional relationships Chapter 3 Chapter 3 describes the development of cyber and electromagnetic activities and offers a framework to guide its progression, roles and responsibilities. It highlights that technological exploitation of the electromagnetic spectrum has increased demands for this resource. 3 Section 1 – Development approach . . . . . . . . . . 23 Section 2 – Roles and responsibilities . . . . . . . . . . 27 Section 3 – Evolving functions . . . . . . . . . . . . . . 30 Section 4 – Development summary . . . . . . . . . . . 34 JDN 1/18 21