You are permitted to use the icons if and only if you received them from the licensor.
You must abide by the terms of this license.
You must give appropriate credit to the licensor in a reasonable manner whenever you use the icons anywhere outside of personal use.
You must not distribute the icons you've received. You are however allowed to direct others to the official source.
You may make your own derivaties for your personal use provided any alterations you may make do not constitute an adaptation.