Licensing DEV and CONS Nodes

Hi,
i have found a note in this post regarding the licensing of dev environments (in addition to allready licensed prod nodes). Where can I find a reference that there is no need for additional licenses for DEV / CONS nodes ?

in my current situation i have 12 licenses for my prod notes and woultd like to use a dev / cons enviroment.

thanks a lot

You'd be best off using https://www.elastic.co/contact, that will reach the best person to help you with this.