Ferrari has revealed it previously considered introducing a Mercedes-style dual-axis steering system on its Formula 1 car, but decided against it because it was uncertain about its legality.
Mercedes caught its rivals by surprise in pre-season testing last week when it revealed the DAS, which can adjust the toe angle of the front tyres between corners and straights when the steering wheel is moved forward and backward.
Rival teams are now looking into whether or not the DAS is worth pursuing for themselves, especially with such a long lead time in terms of development and the fact such a system is banned for 2021.
Speaking at Barcelona on Wednesday, Binotto said Ferrari abandoned its own idea for DAS, and is sceptical about whether it will pursue it now.
"The DAS system is something we considered in the past, but we didn't design and develop," he explained.
"The reason why is the legality matter, which we didn't clarify with the FIA at the time.
"[But] secondly because we believe it's not worthwhile, at least for our car and our car concepts.
"We are looking at what the others are doing. At the moment, it's really a question mark.
"I'm not sure we'll develop it."
While the FIA's opinion is that the DAS fully complies with the regulations, some outfits have questioned that view, and suggest that a final answer will only be available at the Australian Grand Prix.
Binotto was coy about whether he felt it complied with F1 rules.
"I think it's difficult for us to judge," he said.
"In terms of the exact system, I'm pretty sure the FIA will make their own judgement."