Formula 1's 2021 regulations are set to be confirmed in October after teams agreed to delay their release in an effort to level the playing field.
Regulations state a swathe of rule changes must be confirmed by June, however with unanimous agreement that date can change.
Concerns within the paddock went that releasing the regulations in June would afford the larger teams a significant technical advantage, as their greater resources would allow them to begin work sooner.
A December date was suggested instead, giving all teams a little over 12 months to develop their 2021 cars, though that did not receive the unanimous acceptance it needed.
“If you look at it, probably the best time to put it would be December,” Horner said.
“But then the little teams would argue that they can't react to that because the earlier they are, the bigger teams have more resources to split their resources and effectively put more resource on it sooner than a little team.
“October is effectively a compromise between end of year and June, so we're okay with that.”
“Personally I'm in two minds, but I probably would want to support Chase (Carey, CEO) and Ross (Brawn, director of motorsport) and Nikolas (Tombazis, FIA head of single-seater technical matters),” Wolff admitted.
“The trick is, in order to come out with good regulations, you need enough time. That is a fact. But also you need to describe very, very precisely what's being pushed out.
“It needs a unanimous decision of all teams. We are not going to be the ones that make that fail.”
Regulation changes for 2021 are expected to be dramatic, with more aggressive looking cars designed to encourage closer racing on track.
F1 presented its initial concept late last year, while teams received additional information in the week prior to the Bahrain Grand Prix in late March.
Spain hosts the next round of the 2019 campaign on May 10-12.