| Sporting |
| Championship registration | Obligatory registration to WRC series is re-introduced. Teams had to nominate drivers 30 days before each event and only nominated drivers were eligible to score points for the team. |
| Championship events | For 1993, all rounds of the championship counted towards both drivers' and makes' championships for the first time. |
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| Technical |
| Minimum production requirement | From 1st of January 1993 onwards, minimum production requirement for a car to be eligible for homologation was decreased from 5,000 units to 2,500 units. |
