Module 16 Call Signs and Operating Regulations, Part 1

Reading

"7.5 Call Signs" pages 7-19 to 7-22
"8.1 Control Operators" pages 8-1 to 8-3
"8.2 Identification" pages 8-3 to 8-6
"8.4 Third-Party Communications" pages 8-9 and 8-10

List of countries with Third-party Agreements