Is it permitted for a bank account to drop below 400,000 THB for 5 months before renewing a non-O visa based on marriage to a Thai woman?

For those on a non-O visa based on marriage to a Thai woman, the requirement to maintain a bank account balance of 400,000 THB applies only during the 2 months leading up to the visa extension application. After receiving the extension, there is no requirement for the account to maintain that balance until 2 months before the next extension is due.