Hi Alan,
You are correct, as long as you fly on a registred flying site of course.
Now.. That does not stop you passing the A cert anyway
The rule:
Operating an SUA greater than 4kg weight
To operate an SUA weighing greater than 4 Kg will require proof of training from an approved body to a level approved and acceptable to the IAA. To register an SUA greater than 4kg the IAA website will remind users that they will require an approved level of training.
MACI members can automatically achieve this requirement by having a current A Certificate from the MACI training scheme for the appropriate category.