The idea behind the VSC was thought up in the wake of Jules Bianchi's crash at the Japanese Grand Prix that left the Frenchman with severe head injuries.
F1 trialled the idea in practice sessions in the last three races of the 2014 season and last month the introduction of the VSC was officially confirmed.
The FIA has now set out how the VSC will work in 2015.
A statement on F1's official website said the VSC will "normally be used when double waved yellow flags are needed on any section of track and competitors or officials may be in danger, but the circumstances are not such as to warrant the use of the safety car itself".
Drivers will be notified when the rule is in operation by electronic marshal panels that will display "VSC" and the teams will be notified by the official messaging system.
Teams will be alerted when it is safe to resume racing via the messaging system, while the panels on the display boards with change to green 10 to 15 seconds later.
As part of the rules drivers will not be allowed to enter the pits unless for the purpose of changing tyres and must stay above a minimum time as set out by the FIA in each marshalling sector.
The statement added that cars are not allowed to be driven "unnecessarily slowly, erratically or in a manner which could be deemed potentially dangerous".
The FIA's new rules have also officially ratified that the controversial double points rule used for the final round of the 2014 season will be dropped in 2015.