Formula that Does NOT Contain 2 Different Texts

So I'm using Google sheets and I would like a cell to conditionally highlight when the cell does not have 2 specific texts.

So in my example, I would like cell B26 to highlight ONLY if it does not contain NYS or JFK.

Is that possible? It doesn't seem like there's a built in option in Google sheets.

A lot of guides only teach how to create custom formulae for texts that exist.e.g., =ISNUMBER(SEARCH("JFK",B26))

I'm looking for the opposite effect.