Under the deal announced Wednesday, Carlyle would effectively ban its employees from making campaign contributions to public officials who have sway over pension fund investment decisions. The company also reiterated its previous pledges to stop hiring politically connected middlemen to help land government pension fund business.
Cuomo said the rules would limit the possibility that corrupt officials overseeing government investment funds would try to shake down the company for money in exchange for business.
"It ends pay to play. It bans the selling of access. It puts the political power brokers out of business," he said.
Carlyle was one of several firms whose conduct was questioned during a two-year investigation of investment decisions at New York's public employee retirement fund during the tenure of former state Comptroller Alan Hevesi.
Hevesi's longtime political consultant, Hank Morris, was indicted in March along with the pension fund's former chief investment officer, David Loglisci, on charges they demanded huge kickbacks from companies that wanted access to pension fund investment dollars.
Carlyle paid $13 million to Morris for his help in influencing the fund, which ultimately invested more than $730 million dollars with the company.
Carlyle has consistently denied any criminal wrongdoing, but the company said it was willing to make changes.
At Cuomo's urging, it said it had agreed to abide by a nationwide code of conduct that would "usher in a new era of transparency and accountability into the pension fund investment process" and "set a new standard for ethics in the industry."
The investigation has so far led to criminal charges against six people, including the former head of New York's defunct Liberal Party and several politically connected financial executives who did business with the pension fund.
Morris and Loglisci have pleaded not guilty. Hevesi has not been charged and has denied any wrongdoing.
Cuomo's investigation has expanded into several other states where Carlyle and Morris did business with government investment funds, including California and New Mexico.