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, the minimum age to reserve a guestroom at Miami International Airport Hotel is 21 years old, however this age may vary depending on property location. The maximum number of people (combined adults and children) allowed per room is typically four (4) guests, depending on room type.