In 1962 the Nobel Prize was subsequently awarded to Crick, Watson, and Wilkins. Nobel rules now prohibit posthumous nominations (though this statute was not formally in effect until 1974) or splitting of Prizes more than three ways. The award was for their body of work on nucleic acids and not exclusively for the discovery of the structure of DNA. By the time of the award Wilkins had been working on the structure of DNA for more than 10 years, and had done much to confirm the Watson–Crick model. Crick had been working on the genetic code at Cambridge and Watson had worked on RNA for some years. Watson has suggested that ideally Wilkins and Franklin would have been awarded the Nobel Prize in Chemistry.