HWA's place in the new for 2019 FIA Formula 3 Championship has been confirmed, with organisers issuing an entry list with 10 teams and 30 cars for the inaugural season.
Autosport revealed earlier this month that HWA was among the 10 teams to have been granted a place in the series run by Bruno Michel, which replaces the GP3 Series on the Formula 1 support-series ladder.
HWA will also run a Formula E team this year - supplied by Venturi - as a precursor to Mercedes joining the series in 2019/20, and is also set to run the new Aston Martin DTM programme.
The squad is also believed to be considering a Formula 2 entry, which it has been rumoured could be used to develop Mercedes junior drivers.
HWA will be the only team joining the new Formula 3 championship that has not competed in GP3 or the European Formula 3 Championship - the two series that will effectively merge to form the new category - or Formula 2, which is on the same ladder.
ART Grand Prix, Campos Racing, Jenzer Motorsport, MP Motorsport and Trident make up the teams included that have competed in GP3 this season.
ART has dominated the category, winning eight of the last nine teams' championships. Carlin, Hitech Grand Prix and Prema Racing are the teams moving over from European F3.
"We have received a lot of requests from high quality outfits who wished to join our Championship," said FIA Formula 3 CEO Michel.
"It has been a complex process to narrow the list down to 10 teams but we believe that they are the strongest candidates.
"It will be very interesting to see them fight for wins and the title next year."
The entry list announcement also confirms Motopark, which finished second to Prema in the European F3 teams' championship, has missed out on an entry.
Team boss Timo Rumpfkeil told Autosport the outfit's rejection was "not understandable".
Van Amersfoort Racing have also missed the cut, while Arden is the only team that has not signed up from GP3 - although it is absent because it elected not to bid for an entry while it focuses on other projects.
2019 FIA Formula 3 teams
ART Grand Prix
Charouz Racing System
Hitech Grand Prix