'take over representation' is correct and usable in written English.
You can use it to talk about the act of assuming responsibility for another person's duties, usually duties that involve some form of representation. For example, "After his retirement, his son took over representation of the family business."
You can recruit computer-controlled assassins to your posse and dispatch them not only around Constantinople but also to take over representations of other cities around the Mediterranean.
It took over representation of Northwest's mechanics from the machinists union in 1998 promising dramatic gains.
He has been president of the union since May 1999, when the union took over representation of the guards from a rival union.
But the gallery, which took over representation of Ms. Dumas in 2008, told her about it, Mr. Robins says, causing her to add his name to the blacklist.
One of the world's most aggressive literary agencies, overseen by super-agent Andrew Wylie, scored a double coup by taking over representation of deceased Chilean novelist Roberto Bolaño just as an unpublished novel by him was discovered.
But the Zwirner gallery, which took over representation of Ms. Dumas in 2008, told her about it, Mr. Robins asserts, causing her to add his name to the blacklist, according to his suit.
It is hung next to South Crofty of September 1991, where the mine has almost been obliterated by colours, and where pure abstraction has almost – but not quite - taken over from representation.
Mr. Ovitz had previously advised Mr. Clancy on film and television deals but will now take over his representation completely, including negotiating book contracts.
The Aircraft Mechanics Fraternal Association is campaigning to take over that representation so the machinists are said to be waiting to see what happens at Northwest to make sure they get at least as good a deal before settling with United.
