FIA ERC1: For FIA-homologated cars conforming to Rally2 (R5) regulations. That means 1.6-litre turbocharged engines, 32mm restrictors to control performance, four-wheel drive, five-speed gearboxes and price caps to keep design and build expenditure in check. Think Citroën C3 Rally2, Ford Fiesta R5 MkII, Hyundai i20 R5, Peugeot 208 T16, Škoda Fabia R5, Škoda Fabia Rally2 Evo, Volkswagen Polo GTI R5 and more.

FIA ERC2: Typically for more standard ‘showroom’ spec machinery, albeit with turbocharged engines and four-wheel drive, such as the Mitsubishi Lancer Evolution X and the Subaru Impreza STI. However, in addition to N4, cars built to Rally2 Kit and RGT rules are also allowed. And that means cars fitted with the Rally2 Kit of parts from ORECA can take part, along with the RGT-based Abarth 124 rally and Porsche 997 GT3 among others.

FIA ERC3: It’s front-wheel-drive hot hatches in essence such as the Ford Fiesta Rally4, Ford Fiesta R2T, Peugeot 208 Rally4, Peugeot 208 R2, Renault Clio R3T, Renault Clio RSR Rally5 and Opel ADAM R2.

FIA ERC Junior: Drivers aged 28 and under on 1 January 2021 in Rally3 cars on Pirelli tyres.

FIA ERC3 Junior: For drivers aged 27 and under on 1 January 2021 in Rally4 and Rally5 cars on Pirelli tyres.

Abarth Rally Cup: The Abarth Rally Cup features on six ERC rounds in 2021 for competitors using the lightweight, rear-wheel-drive Abarth 124 rally on Pirelli tyres.

Clio Trophy by Toksport WRT: Entry-level, arrive-and-drive category from Toksport WRT using Michelin-equipped Renault Clio Rally5s all run under a central service area on five ERC events.

ERC-MICHELIN Talent Factory: Rewards drivers 28 and under on 1 January 2021 in Rally2 cars on MICHELIN tyres with a package of incentives.