Team boss Frank Williams says Formula 1 should operate under a single set of rules and not become a two-tier series.
The FIA on Thursday confirmed the introduction of an optional £40 million budget cap from the 2010 season, with those teams adhering to it being allowed more technical freedom.
The move would mean two different kinds of cars on the grid, an scenario that has led to criticism of the rules.
Williams admitted on Thursday that his team was in favour of introducing a budget cap, but said he was against having a championship with two sets of regulations.
"Williams has supported the introduction of a budget cap since the idea was first put forward early in 2008," said Williams. "Since then FOTA has made tremendous steps forward on costs but the rationale for a budget cap has also grown even stronger.
"We would like to see all the teams operating to one set of regulations and under a budget cap in 2010 and that is the position we will be advocating within FOTA when we meet next week.
"We understand that this will represent a serious challenge for some of the teams but we expect that FOTA will work together to find a unified and constructive way to take the FIA's initiative forward."
McLaren team boss Martin Whitmarsh had earlier said his team was also against a two-tier series.