
They all need and ATC, and youn will be sent a letter if you qualify.
If the young dog has any awards counting towards the title of champion then the lowest class it can go into is Limit, if it is out of age classes.
Otherwise you go in the age related classes if applicable or the lowest classes that it qualifies for after reading the class definition.
A champion can only go in the open class.
If you qualify in the UK then the answer has been given on the other thread. If in your won country then as I saud you wil get a lettter, but it is basically best Dog and bitch and best yougn dog and bitch out of two nominated shows in each country, and the qualified dogs will be given/sent a letter to confirm they qualified.