The phrase "a condition of supporting" is correct and usable in written English.
It can be used when discussing the requirements or prerequisites necessary for providing support in a particular context.
Example: "The organization outlined a condition of supporting the initiative, which included securing additional funding."
Alternatives: "a requirement for support" or "a prerequisite for backing".
He said he would not ask lawmakers to approve his legislation as a condition of supporting the safety commission, as some Metro supporters have feared.
It is not clear what concessions Mr. Malone may seek to extract as a condition of supporting a deal.
The United Automobile Workers union and members of Congress from automaking states insisted on that provision as a condition of supporting the broader compromise.
One minister claimed that colleagues had never wanted an early election, and had made that a condition of supporting May's initial leadership bid.
Mr Ayrault's friends in Germany's opposition Social Democratic Party want growth-friendly add-ons as a condition of supporting the fiscal compact.
The Tea Party enthusiasts are intent on near-term government spending cuts as a condition of supporting any increase in the debt ceiling.
Labor had demanded "complementary" protections for Australian jobs as a condition of support, but Abbott ruled out negotiations with the opposition and sought unqualified support.
According to the Associated Press, many officials insisted on this exception as a condition of support, which is really about punishing two particular individuals, Steven Hayes and Joshua Komisarjevsky.
Parties that position themselves to Labour's left – including the Greens, SNP and Plaid Cymru – are now demanding a break with austerity as a condition of support for a minority Ed Miliband government.
The Subcommittee revised its final report form in April 2013 (providing progress reports and a final report is a condition of support from the Subcommittee).
In particular, he said that post-war planning would have been much better if Blair had made this a condition of Britain supporting the war.
