Boys typically wear a collared shirt, tie, and slacks of required colors, although polo shirts have to some extent replaced dress shirt.
en.wikipedia.org A jacket, dress shirt, necktie and jeans are demonstrated as "smart casual" attire.
en.wikipedia.org The uniforms consist of a plaid kilt and either a dress shirt, or for high school students a polo shirt.
en.wikipedia.org The dress code is formal, males must wear suits, or sport jackets, neckties are required with dress shirt.
en.wikipedia.org In a corporate office, appropriate clothes are clean, business casual clothes such as a dress shirt, polo shirt, and trousers, or other similar outfits.
en.wikipedia.org