The mention appears in two forms on the invitations catalogued by the site. The first, "Black tie (tenue de soirée)," is the strict reading: under the Debrett's rule in the protocol register, black tie requires men to wear a black wool tuxedo, single-breasted, without vents, with peaked silk lapels or a shawl collar, and a bow tie you tie yourself. That is the code of the amfAR gala in Venice, on Sunday, September 6, 2026 at the Molino Stucky, during the Mostra. The second, "Tenue de soirée / robe longue," spells out the expectation for women: it is the code of the MY Yacht Monaco party, aboard a superyacht in Port Hercule during the Monaco Yacht Show (September 23 to 26, 2026), and of the summer parties of the palace hotels, from the Hôtel du Palais in Biarritz to the Hôtel du Cap-Eden-Roc. Above tenue de soirée there is only one degree: white tie, the tailcoat, reserved for the most formal balls and galas. Below come cocktail attire and business dress. The classic trap is confusing evening dress with dark dress: a business suit, even a black one, is not tenue de soirée as invitation cards mean it, and the tuxedo remains the right answer for men.