Lewis Hamilton says the FIA needs to tackle a lack of "transparency and accountability" for its decisions amid the fallout from calls made at Formula 1's recent Mexican Grand Prix.
A number of drivers were surprised that several others were not punished for appearing to gain ground by cutting the first sequence of corners at the start of the race.
Ferrari's Charles Leclerc, Red Bull's Max Verstappen and Mercedes' Kimi Antonelli all came under the spotlight for skipping across the grass at the first corner before rejoining.
Hamilton then found himself on the receiving end of a 10-second penalty later on for running across the grass at the Turn 4 left-hander in a fight with Verstappen, just seconds after his rival had done the same at Turn 2.
Speaking ahead of the Brazilian GP, Hamilton suggested there were wider issues at play as he said he had no clear understanding about why certain decisions were made.
Asked by The Race if he had been given some clarity about the FIA's rulings, he said: "Not particularly.
"There isn't any clarity. And I think that's probably a part of the bigger issue: transparency and accountability. And also the secrecy that decisions are made [with] in the background.
"I think it's something that definitely needs to be tackled. That's probably something that needs to be done in the background, I would imagine."
Hamilton felt the matter of how the FIA handled in-race decisions was something of the utmost importance, as it could potentially change race results and even championships.
He dropped a hint about his own experience of seeing his title ambitions wiped away at the 2021 Abu Dhabi GP through mistakes that were made by the FIA and then race director Michael Masi.
"I don't know if they're aware of the weight of their decisions," he added. "They ultimately steer careers - and can decide results of championships, as you've seen in the past. So some work needs to be done there I'm sure."
Hamilton was not alone in questioning what happened in Mexico, especially at the first.
Mercedes driver George Russell, who was third of those on track through Turn 2 before others who had cut the corner slotted back in front of him, and was vocal in-race about Verstappen jumping the first corner, said: "I was very, very surprised to see those drivers get away without penalty."
While a better solution to prevent drivers gaining an advantage by cutting across the grass in Mexico could be put in place for next year, Russell thought a total revamp of the corner complex was needed.
"I personally don't like that corner at all," he said. "I don't think it's good for racing.
"Turn 2 and Turn 3, there's only one single racing line. So you can't battle into Turn 1 and then continue the battle down to Turn 4, as you can at a circuit like Bahrain, as an example, when you can cut back on somebody and you fight down to Turn 4: there's no track limits issues with a race start as it's a hairpin, you will never cut the corner.
"We actually briefly spoke about it before the [Mexico] race weekend; I personally think that that corner just needs to change entirely."
Fernando Alonso, who was especially annoyed about rivals not being punished at Turn 1, suggested if nothing was done to change the track configuration then he would not bother taking the first corner at all next year.
It was something that he did at Sochi in 2021, during the most recent Russian GP, when there was a similar opportunity at the Turn 2/3 complex.
"In Ste Devote, in the first corner of Monaco, there is never any problem," he said. "We all go through that corner where there is a wall and then everyone was cutting.
"The one year I just don't brake for Turn 1 [in Sochi], I was P3 at the exit of the corner and, for the following year, it was not allowed.
"So it will be [illegal] for '27 because if I do it in '26, they will only change Mexico for '27."
