Christopherxx wrote:I wasn't aware that the mahasi centre was structured like that ...
There isn't really such a thing as a worldwide "Mahasi Centre Structure". Many different monasteries (and lay organisations) teach variations of that style, and have their own way of organising things.
Having said that, there will be groupings. Those are closely affiliated with U Pandita's monasteries (U Pandita was one
of Sayadaw Mahasi's students), for example, will have a similar structure. However, I don't think you'll find the sort of consistency that Goenka's organisation has. Monasteries don't really work that way (hence the enormous variety in even the Ajahn Chah sub strand of the "Thai Forest Tradition").