Asset Store's free licenses - where can I find them?

The Asset Store submission guidelines states:

For consistency sake, all Asset Store offerings are covered by a license we have created. Please have a look at the license to be sure you are comfortable with it. If you are offering your content for free, you have the further option of selecting one of three free-licenses, which override the basics of our commercial license. Please do not include your own license terms in your offering.

Now the question is, where can I find those three licenses? I haven't been able to find them anywhere. It is not even possible to select which license to use when submitting a package.

I have also emailed the Unity Asset Store guys, but they don't seem to want to answer my question since I have waited a few weeks for their reply now.

Thanks in advance!