You may use the following command from the AWS Command Line Interface to configure the account password policy. This is an example configure and more information may be found here.

aws iam update-account-password-policy –minimum-password-length 8 –require-uppercase-characters –require-lowercase-characters –require-numbers –no-require-symbols –max-password-age 60 –hard-expiry –allow-users-to-change-password –password-reuse-prevention 24