Setting a password policy

[a bv]

Hi list,

Im in a need of setting a password policy on some Redhat EL 3,4,5 x.
Im giving the policy below and im asked to if this is possible and if
how.

-Passwords to change 90 days instead of 180
-Password change must be forced by the system
-Password length must be at least 6 characters long
-Last 3 passwords to be remembered by the system and dont let these to
be used at the password change
- When 6 logon attempt fails occur , the system to lock that ID/user
-Complexity (optinional)

Thanks and regards