A license will contain a number of sub-qualifications or ratings. These specify in more detail the actual privileges of the license, including the types of aircraft that can be flown, whether flight under Instrument Flight Rules and at night is allowed, and whether instructing and examining of trainee pilots is authorized. Ratings include Single and/or Multi-Engine Aircraft, Land or Seaplane, each of which require a checkride with an approved examiner.
Read more about this topic: Private Pilot Licence