Can we enforce password change and complexity?

Is it possible to amend/configure the web parts so that users have to reset password every half year and enforce password complexity? Thanks.
You can enforce password complexity through the membership provider settings. Check the passwordStrengthRegularExpression, minRequiredNonAlphaNumericCharacters and minRequiredPasswordLength:

http://msdn.microsoft.com/en-us/library/system.web.security.sqlmembershipprovider(v=vs.110).aspx

Unfortunately at the moment the FBA Pack does not have a feature to force a password reset at specified time intervals.
We created a console app and added it to a scheduled task for this.