Darwin formal

Darwin Formal is a semi-formal dress code for evening events held in the Northern Territory, Australia, originating in Territorian conventions for attire in the 19th century. The dress code is by its principal element, which is no flip flops (or thongs, as they are referred to as in Australia).

Is Michael Caine wearing Darwin Formal? While he is wearing a polyester tie, his boat shoes mean he is indeed wearing Darwin Formal.