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.
Generally speaking, you must be 18 years old with a valid ID, and many hotels require a major credit card in your name. I have heard of some exceptions, where it is difficult if not impossible to rent a hotel for a teen during spring break for example. The previous answer incorrectly stated that you must be 23 to rent a hotel room and a car, and in both cases, age 18 is generally accepted. For car rentals, valid ID is required, anyone under 25 usually must pay quite a hefty premium, and only select rental companies allow this. Categories: Legal.