It can be a works team entry. No problem with that. Only the car must be physically run by someone else. This year Škoda already used Kresta Racing or Wevers Sport services while the cars were in works colors and prepared in works service area (in both cases it was for Nordgren and in both cases it was due to the simple fact that the works team staff was elsewhere).

Just out of curiosity - even Kopecký's car in Czech championship is sort of semi-works because it's being prepared in Kopecký's own family facility (former CRT WRT). Despite that he drives under works banner, with full works show in the service park and for Škoda's money.