Irrelevant
All retailers have to handle repairs within first 12 months if customer wants
Short answer - see the orange text.
--Long answer--
The retailer has a period after the point of sale where any fault reported will be deemed to have been likely to been present/active at the time of sale and the customer will be able to claim a replacement/refund. Google have set this to 15 days instead of the more normal UK default* of 28. They are likely to get away with it imo.
Outside this initial period and within the first 6 months you are in a position where if a defect is reported (doesn't matter when you noticed it, its when its reported) the retailer gets to choose what to do. Whether to replace, repair or refund. In the first 6 months the retailer must inspect (and prove) that you caused the defect if there is a dispute.**
Most retailers will offer 12 months on this type of device. During this time
the retailer may choose to appoint a repair agent. _And_ can tell you to call them and deal with them directly to initiate your repair. You may bring complaints about them to the retailer to address, but you cannot refuse to call the repair agent with online etailers simply because the etailer can say they do not have booking systems and technical expertise to deal with your call.***
I think I saw it mentioned earlier in the thread that 2 years might be available but I've no idea whether this is dependent on you registering with Asus separately. I haven't bothered reading the 2 little booklets that came with mine.
Outside the first 12 months the retailer may have a responsibility for the device longer than this (It is not automatically 6 years but...). Bad design or manufacture could lead to a device failing ahead of its minimum expected design lifespan. This would be applicable after the above 2 year Asus warranty. If it breaks after year 2 it may be worth contacting your retailer. They may not insist you get an independent report simply because they would have to pay for the report on top of the settlement fee if it proves a manufacturing defect was present. However with a touchscreen tablet I rekon you might have a hard job after 2 years getting proof of none wear and tear.
*This varies on the type of product. Few retailers would offer 28 on clothing etc.
**Outside the first 6 months the retailer can ask you to independently prove the defect isn't wear and tear / poor manufacture.
*** I know the bricks and mortar retailer I used to work for used to refuse to accept on site certain printer returns to store and insisted the customer call the repair agent to arrange collection directly, but that policy went down like a lead balloon and didn't last too long iirc. I don't actually know the true legal position on referrals to repair agents for bricks and mortar, but these days you can just expect to return it to any store and be called to collect it when it returns.