Topslide
Perhaps the Spanish have filed a difference with ICAO as in THIS example from the UK
State Variations to ICAO Wake Turbulence Category
States may elect to operate variations to the ICAO scheme if they wish. One example of this is the UK where the main differences are the re-definition of the lower weight end of the ICAO ‘MEDIUM’ category:
An extra category called ‘SMALL’ is defined as aircraft types with an MTOM (maximum take-off mass) of between 17000 kg and 40000 kg
The ‘LIGHT’ Category defined in the ICAO scheme is extended to cover aircraft types with an MTOM of up to 17000 kg
In addition an ‘UPPER MEDIUM’ aircraft type category is defined from within the ICAO ‘MEDIUM’ category (only) for approaches made at EGLL EGKK EGSS and EGCC.