Yet, precisely, the need for disclaimers is decided on a per package basis. When a maintainer asks for disclaimers, disclaimers are needed for all translations coming from any team for that package. For GNU packages, maintainers do not really have a choice, as the GNU project requires disclaimers for almost all its packages. For non-GNU packages, the choice is up to the package maintainer. The safest for translators is to fill and return disclaimers, in this way, they put themselves free, once and for all, to work on all translations they will feel like, whether GNU or not.
Unfilled forms are also available through the Web.
It would probably our jobs easier to make sure that all the versions included that part. In the meantime, please make sure you write for which team you intend to translate. Once you have the file, you should print it out on paper, fill it out and sign it with a pen, slip the results into a paper envelope, lick a stamp and send it by non-electronic mail, using the old slow way, to the address given in the form. It may take many days for your envelope to reach the FSF's headquarters, and maybe two more weeks before your form is properly processed there. You have to account for postal delays, but also for the fact postal mail is handled in bursts at the FSF, maybe twice per month.