10. No sum shall be transferred from the ledger account of one client to that of another, except in circumstances in which —
(a)
it would have been permissible under these Rules to have withdrawn from a client account the sum transferred from the first client and to have paid into a client account the sum so transferred to the second client; or
(b)
it would have been permissible under the Conveyancing Rules to have withdrawn from a conveyancing account the sum transferred from the first client and to have paid into a conveyancing account the sum so transferred to the second client.