Before 2013
The championship was split into four classes according to the vehicle's age and technical specification. [7]
| Class | Vehicle eligibility |
|---|
| A | 1966–1971 Formula One cars |
|---|
| B | Post–1971 non-ground effect Formula One cars |
|---|
| C | Post–1971 ground effect Formula One cars |
|---|
| D | Post–1971 flat-bottom Formula One cars |
|---|
The HFO Competition featured classic Grand Prix racing cars from the 20-year period between 1966 and 1985. During that period, there were design innovations and regulatory changes that resulted in significant performance differences and a vast speed differential between the earlier cars such as the Tyrrell 001, and the later machines such as the Tyrrell 012 and Brabham BT49.
Drivers score points within their particular car's class and all have the chance to claim the overall FIA trophy at the end of the season.
Points
Effectively, there are four competitions going on within every race and each provides points for the driver based on his or her placing in the car's class and the number of competing cars in that class.
| Number of starters in the class | Points awarded |
|---|
| 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|
| >3 starters | 9 points | 6 points | 4 points | 3 points | 2 points | 1 point |
| 2–3 starters | 6 points | 4 points | – | – | – | – |
| 1 starter | 4 points | – | – | – | – | – |
An additional point will be awarded to the drivers who achieve the fastest lap in each class during the race.
Championship awards
The Champion is the driver who scores the greatest points total, regardless of the class in which he or she competes, and a driver can switch classes during the season. In addition to the overall champion, awards also go to drivers with the highest total of points in each class excluding the overall champion, as follows:
Historic Formula One Historic Cup – The competitor scoring the highest number of points in Class A.
Historic Formula One Classic Cup – The competitor scoring the highest number of points in Class B.
Historic Formula One Cup – The competitor scoring the highest number of points in Class C.
Historic Formula One Sporting Cup – The competitor scoring the highest number of points in Class D.
These are all FIA awards that are presented at an official FIA Historic Awards event.
Additional awards
HFO also presents its own awards at a slightly less formal and usually much more boisterous event as follows:
The Chairman's Trophy – Introduced in 2009 by Tony Smith, this is awarded to the competitor who, in the chairman's opinion, best exhibits the "Spirit of the Championship".
The Geoff Richardson Trophy – Provided by an engine builder, the trophy is awarded to the best newcomer.
The Nicholson McLaren Trophy – Provided by another engine builder. This 'trophy' is awarded to the 'best' team.
The Ensign Trophy – Provided by the former CEO of HFO, Mike Wheatley, who is something of an Ensign fan, having 'raced' an example in HFO very successfully. Although never a winner, the marque was at its peak during the Class B period and this trophy goes to the winner of Class B.
The Colin Chapman Trophy – provided by Clive Chapman and Classic Team Lotus. It is hard to imagine any historic category without a Colin Chapman Trophy but, as in HFO's case, it is equally hard to determine which period it might be applied to since Chapman was responsible for so many 'innovations'.
After considering that Class C covers the period when ground effects, carbon fibre chassis and the controversial twin chassis Lotus Type 88 all emerged from Chapman's expertise, it was agreed that this trophy would go to the winner of Class C.
Current season 
