Marriage Visa: Is it required that the 400K Baht needs to be sent from a foreign bank, and do you need a certificate from bank that the money has been transferred from a foreign account?

How long do I need to wait before I can spend this 400K Baht "after" I've already got the 1 year extension?

After getting one year extension based on marriage, how long 400k balance should stay on one’s account?

Please can I get definitive advise on funds in the bank once a marriage visa extension has been approved/stamped in your passport.

I currently live in Chiang Khan with my Thai wife.

I would like to know for certain when I can access the 400kbaht?

My stamp of approval (year extension) was the end of February 2021.

Your advice would be most appreciated.