When we say re-registration of assets (sometimes called 'in specie' or 'stock transfer') is the process of transferring funds or shares to a different platform without selling the underlying investment.
Your holdings will be re-registered with the platform of the new company you have chosen to administer your investments. There will be a change of nominee account, but you remain the beneficial owner of the assets.
During the transfer, there will be a period when you won’t be able to sell your existing investments.