For a general audience, smart business professional attire (technically, informal wear, that is, a suit and tie or equivalent for ladies) was acceptable.
Gentlemen were to wear a correct morning suit, either black or very dark gray with the traditional striped trousers, patent leather shoes, and cutaway.
An ascot or equivalent formal tie would be worn with a gray waistcoat over a white dress shirt with arrow collars.
The Vatican subsequently pointed out that the traditional form of dress worn for papal audiences was no longer obligatory.
In the United Kingdom, audiences with the British monarch are usually listed in the Court Circular, which is published daily by the broadsheet press.