I have renewed my Retirement extension till 30th July 2021. I understand that I have to retain 400K in the bank for at least 4 months. After that I have to top up a total of 800K. My question is this. For my next year extension, I would like to change bank to renew the next extension. Assuming I put in a total of 800K into a new bank today and leave it untouch for 6 months or more. And I have taken all out from my previous bank. Is this acceptable ? You kind advice is much appreciated. Thanking you all in advance.
 

Need to retain 800K for 3 months after extension and 400K always as a minimum balance..topping up to 800K 2 months before your next extension.

You can change banks but you will have to show both bank books when you apply for your next extension.

Just be sure you do a transfer from the old account to the new one so it is shown as being done on the same day.