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.
The minimum age to reserve a hotel room is 21 years old. A person of the minimum age requirement must be present at check-in time and become a registered guest in the room. Because the hotel does not offer gambling, there are no age restrictions. However, entry into the Casino does have age restrictions.