Regarding the Use of Standard Assets?

Hi there everyone! I hope everybody's games are coming along well!

I wanted to quickly ask whether or not it would be within the rules to include Unity's Standard Assets and Post Processing stack into our project? The rules say that we would be fine using 3rd Party Assets as long as we opt-out of the appropriate voting category. But does that still apply to assets that come with the engine, such as lens flares?

Thanks in advance! Good luck with your game! :)