Question 119, Air Law - ATPL - Airline Transport Pilot license

An approach sequence shall be established according to the sequence of initial radio contact between aircraft and approach control
Approach control have to advise the aircraft operators about substantial delays in departure in any event when they are expected to exceed 45 minutes
During a visual approach an aircraft is maintaining its own separation
If it is anticipated that an aircraft has to hold for 30 minutes or more, an Expected Approach Time will be transmitted by the most expeditious means to the aircraft