Just received this from Nissan UK which confirms my dealer's view.
Dear Mr Smith
Our Ref: 1-1R3GMG
Thank you for your e-mail to Nissan regarding your Nissan 370Z black edition.
I can confirm that when you have your Nissan 370Z serviced at a Nissan dealership within its service schedule (12 months or 9,000 miles which ever comes first) your Nissan 370Z gets 12 months RAC Roadside Assistance. Every time you have your Nissan 370Z serviced at a Nissan dealership your Nissan 370Z will get another 12 months RAC Roadside Assistance cover.
The RAC Roadside Assistance cover is registered to the vehicle itself and not the owner. Should you decide to sell the vehicle the RAC Roadside Assistance cover will go with the vehicle.
I hope this information has been useful. If there is anything else that you feel we may be able to assist with, please do not hesitate to contact us at Nissan Customer Support on 08457 669966. You may also visit us at http://www.nissan.co.uk for further details on any of our vehicles and for a selection of e-brochures.
Yours Sincerely,
Kenny Brown
Nissan Customer Service GB
Opening Hours Mon - Fri: 08.00 - 20.00, Sat: 10.00 - 16.00
Tel: 08457 669966
Fax: 01923899918
E-mail: gb@nissan-services.eu
Web: http://www.nissan.co.uk