Wednesday, July 3, 2013 at 1:01PM If you occasionally do short-handed (1 or 2 people) racing, and your boat is in a different configuration for this, you can apply for a separate Short-Handed certificate, once you have a 'primary' certificate for your crewed configuration.
Wednesday, July 3, 2013 at 12:58PM 
If you sell your boat and it has a current valid certificate, this will be automatically invalidated.
If you buy a boat which has a current valid certificate, you will need to apply for re-registration.
If the last certificate has expired you will need to renew it.
Please complete a re-registration form available in the IRC Application Form section.
Wednesday, July 3, 2013 at 12:55PM Running a trial certificate allows you to see what the rating effect would be if you made proposed changes to the yacht, rig or sails.
Wednesday, July 3, 2013 at 12:50PM If you change anything on the boat, or buy new sails etc. that may affect your IRC Rating, you will need to apply for an amended certificate. You can make any number of changes for the price of one amendment.
Wednesday, July 3, 2013 at 12:47PM An IRC trial certificate is to allow an owner to assess the effect of a proposed modification to his boat which because of the confidential nature of IRC he is unable to calculate for himself.