I have seen in lots of VAs things like:1. A fleet of a certain quantity of specific aircrafts, with N-numbers, age, etc. My question: is there some rule VAs adhere in offering their planes, or is it totally occasional ? Why do some companies make x planes available ? Why note 2x or 3x? Is there any limitation against several pilots flying an infinite numbers od flights with the very same aircraft at the same moment ?2. A company says that part of fleet is theirs (patrimony) whilst other is leased. In resume: can anyone say where I can find material for orientation about rules governing virtual airlines, in case they exist any how ?Thanks in advance.

>1. A fleet of a certain quantity of specific aircrafts, with>N-numbers, age, etc. My question: is there some rule VAs>adhere in offering their planes, or is it totally occasional ?VAs can pick their fleet as they wish. Some go all the way with reg numbers, others just offer aircraft type.>In resume: can anyone say where I can find material for>orientation about rules governing virtual airlines, in case>they exist any how ?There are no rules for VAs.Cheers!Luke