Ivana Trump has one simple rule when it comes to being a strong female entering the boardroom.

“Pretty, frilly dresses are nice to have, but every woman must own a business suit if they want to feel powerful and taken seriously when it comes to conducting business,” Trump told The Post on Tuesday at Dennis Basso’s fashion show.

So does she approve of her daughter Ivanka’s wardrobe? “Oh, yes,” she said. “Ivanka has great style, as well as a couple of power suits — who do you think she learned it from?”