Those terms apply to monitors sold by Dell directly. If you purchase a system anywhere else, the Dell warranty may apply if the seller conveys the Dell warranty to you (i.e., the seller is authorized).  Any other seller:  Dell will refer you back to the seller.  There are plenty of sellers (usually individuals or third party sellers) who obtain their stock through non-authorized means or outside the country of sale.  You can easily find yourself with no recourse to Dell at all in such a case. Buying from a non-authorized source means you should thoroughly check the seller's credentials, or you may find yourself without a warranty at all.  
I am writing from Italy and I am interested in purchasing a U2723QE monitor. If I buy it from the Dell Italy site, I will pay 755 euros for it, which is about 100 euros more than the price of some other seller on the web. Cheaper web vendors say they sell the European version of the U2723QE. In general, what are the differences between the monitor sold by non-Dell store (European version) and the monitor sold by Dell Italy site? Is it the same warranty? Many thanks for any suggestions. Greetings. Devis
U2723QE, warranty