What happens when you need to change the password for a given site? What if the website has specific requirements for the password not addressed by this method

What happens when you need to change the password for a given site? What if the website has specific requirements for the password not addressed by this method (e.g. numerals, a subset of special characters, etc)? Did not see this addressed in the FAQ or intro, only this on the Goals and Design page: By restricting the system's output ... to upper and lowercase alphabetic characters, we obtain maximum compatibility with all websites ... adding special characters is also explicitly and fully supported by the OTG system.