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.
Best Answer: Most hotels/motels require that you are 18 years old to stay. Almost every big name hotel will check your ID. Many less expensive motels such as Motel 6, Budget Inn, Super 8, etc. will not even look at your age unless you are 1.) acting like an idiot 2.) acting in a suspicious manner or 3.) you are a cash paying customer.