Where does the Event Aggregation registration happens

Where does the Event Aggregation registration happens

References

Reference NO 1

http://stackoverflow.com/questions/15177441/comunicating-between-views-design-patterns-with-events

Reference NO 2

http://stackoverflow.com/questions/8406476/publisher-clarification-for-event-aggregator-design-pattern

Reference NO 3

http://codebetter.com/jeremymiller/2009/07/24/how-i-m-using-the-event-aggregator-pattern-in-storyteller/

Reference NO 4

http://lostechies.com/derickbailey/2012/04/03/revisiting-the-backbone-event-aggregator-lessons-learned/

Reference NO 5

http://csharperimage.jeremylikness.com/2012/11/building-javascript-event-aggregator.html

Reference NO 6

http://www.udidahan.com/2009/06/14/domain-events-salvation/

Reference NO 7

http://www.codeproject.com/Articles/355473/Prism-EventAggregator-Sample

Reference NO 8

http://neverindoubtnet.blogspot.com/2009/05/prism-event-aggregator-subscription.html