Basically it was argued that it would be hard to implement for Monaco.

"It was originally, I think round seven that they were going to change it,” Vowles told media including RacingNews365.

“We highlighted that it had Monaco in between, and it’s really difficult for teams to effectively have the right stock of front wings for Monaco.

“So we got deferred back to the race after Monaco.”

Despite the late changes teams will have to make, Vowles does not think it will impact Williams as much as other squads.

“Our wing was already along the pipeline of production when the rules changed,” Vowles admitted.

“In terms of exploiting that area, I think you’ll find all teams are doing what they can, but there are going to be teams that are more advanced in that area than others.

“I don’t think we’re market-leading in that particular area.

“However, what I can also say is the rule change around [race] nine doesn’t particularly trouble us.

“As a result of that, and it probably will have a more profound effect on others.”