Under what circumstances might the FCC issue a Special Temporary Authority (STA) to an amateur station?
To provide for experimental amateur communications✓Правильный ответ
To allow use of a special event call sign
To allow a VE group with less than three VEs to administer examinations in a remote, sparsely populated area
To allow a licensee who has passed an upgrade exam to operate with upgraded privileges while waiting for posting on the FCC database
Объяснение
Special temporary authority covers immediate or temporary operation outside what a regular authorization allows, which in the amateur service has meant experimental work such as tests on spectrum not otherwise available. Special event call signs come from the call sign database, a VE team needs three examiners with no remote-area exception, and privileges after a passed upgrade exam are granted automatically rather than by STA.