What are FFA guidelines for pilots?

If you so a Google search for FAA (Federal Aviation Assoc.) guidelines, you'll get your answer.

To assist you with this, I queried Google and here is a result:
http://www.faa.gov/regulations_policies/faa_regulations/

You'll find what you're looking for under this title:
Pilots, Flight & Ground Instructors

BTW, what does your tag Fred Perry have to do with pilots or FAA?

all pilots must wear Hawaian shirts and Fred Perry sells em.