OK this is interesting. Yes, it seems there's a new ruling so Austrian Diplomats can get tax relief at the point of purchase. Not surprising Tesla staff don't know about that, I'd suggest!
"A completely new rule concerns the tax-exempt purchase of a motor vehicle from an Austrian car dealer, since – contrary to current practice – this rule provides for a direct VAT exemption and the standard consumption levy. This essentially contributes to speeding up tax relief. As regards the tax-exempt purchase of a motor vehicle, the following procedure is applied:
- For the tax-exempt purchase of a motor vehicle the claim form U45 is required, on which – inter alia – the car dealer, the type of the car and the purchase price must already be indicated. The form may be completed and printed (e.g. by the car dealer) by computer via the homepage of the Federal Ministry of Finance. The completed form, which is certified by the diplomatic mission, must be filed with the Federal Ministry for Foreign Affairs which issues the certificates (for the entrepreneur and for the registration authority).
- The certificate for the entrepreneur is handed over to the Austrian car dealer. On the basis of this certificate the sale is exempt from value added tax and exempt from the standard consumption levy.
- The certificate for the registration authority is handed over to the registration authority which enters the blocking note in the registration certificate.
Also the purchase of used cars can be effected tax-exempt by following the same procedure.
If the motor vehicle is not bought but leased (rented), the tax exemption applies only to the standard consumption levy. Value added tax is imposed on the respective lease payments. This VAT is refunded by way of the refund procedure (in the case of diplomats within the frame of the maximum refundable amount) on based on the invoices."
So looks like all he needs to do is point them to that and he should be good to go.
The only potential issue I can see is finding someone in Tesla to do the admin for this. As they are not a traditional 'dealer' that might involve some effort on his part.
Hope he enjoys his 3!