The image below is a schematic flow diagram of a typical oil refinery that depicts the various unit processes and the flow of intermediate product streams that occurs between the inlet crude oil feedstock and the final end products.
In order to check-in into a hotel, the person must be 21 years old.  If the person is younger than 21, then a parent or guardian can  give permission for them to check-in. 1 person found this useful.
Age to rent a hotel room and car in Europe? I know it will vary by country but I know Europe lets 16 year olds drink, so it seems they consider 18 year olds full grown adults rather than 21-25 in the Us. That being said. My 18 year old son wants to visit Europe with his 18 year old girlfriend. I need to know if they will be able to at least rent hotel rooms. Even if they cant rent a care i'm aware there are other means of transportation available in most major cities.