It translates to: "The Groom is wearing a Tuxedo, and he wants you to look as formal as possible without forcing you to rent a suit."

• Do: Wear a Tuxedo if you own one. If not, wear a solid Black, Midnight Blue, or very dark Charcoal lounge suit with a white shirt and a conservative dark tie.
• Don't: Wear a light grey suit, chinos, or an open-necked shirt. Also, never wear a bow tie with a normal suit—it looks like a costume. If you aren't wearing a tuxedo, stick to a long tie.