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.
Please verify requirements with the consulates of the countries visited prior to your cruise. For guests under 21 years of age or those who are traveling with children, please note: 1  Entry into the disco after 10 p.m. is limited to guests 18 years and over.