International Photographers Association is an all inclusive, non-profit organisation representing specialist royal photographers who provide bespoke imagery of the British royal family to the world's media.
It is a member of the British royal rota system.
"The Royal Rota is a system of allocating media positions at Royal engagements to ensure that as many media organisations as possible have access to Royal material without overcrowding the venue. Royal Rota material is provided on a reciprocal basis and is regarded as exclusive to the Rota pass holder. The Royal Rota party is a group of up to 20 photographers, cameramen and reporters chosen by various press organisations representing all of the media. They make their material available to national and local end users as well as overseas media when appropriate. By means of the Rota the press party is kept to an optimum size; to ensure that they do not get in each others way nor in the way of other guests, whilst ensuring that the material receives the widest possible distribution. Royal Rota material is not controlled or censored by Buckingham Palace Press Office, which is responsible only for seeing that adequate media facilities are given to report on public engagements undertaken by the Royal Family".