NEW YORK (CNN/Money) - In the aftermath of the conflict-of-interest scandals on Wall Street, Citigroup's CEO Sanford Weill has signed off on rules limiting his interaction with analysts, including having a monitor in place when he does discuss research, according to a published report Monday.

Regulators plan to ask the CEOs of other major banks including Goldman Sachs' (GS: Research, Estimates) Henry Paulson and Morgan Stanley's (MWD: Research, Estimates) Phil Purcell to agree to similar moves, according to the New York Daily News.

"If some person or even the CEO is going to be pressuring the analysts one way or the other, that's something compliance should know about," Darren Dopp, spokesman for New York State Attorney General Eliot Spitzer told the paper.

The top investment banks agreed to a $1.5 billion settlement with regulators in Dec. over allegedly tainted stock research, although the NASD and the New York Attorney General's Office are heading for a showdown over a final regulatory report, threatening to delay completion of a broad settlement of research practices with the firms.

Shares of Citigroup (C: Research, Estimates) fell 31 cents Friday to close at $36.80.