UPDATES: BRIEFLY NOTED

Frank G. Zarb, chairman and chief executive officer of Alexander & Alexander Services Inc., will become president and CEO of the National Assn. of Securities Dealers after the integration of A&A and Aon Group Inc. is completed. . . .U.S. Rep. Jerrold Nadler, D-N.Y., plans to introduce legislation this week mandating insurance coverage for annual mammograms for women age 40 and older. . . .Legislation introduced late last month by Sen. Barbara Boxer, D-Calif., would bar employers from requiring employees to invest more than 10% of their 401(k) plan contributions into company stock. . . .Liquidators of Electric Mutual Liability Insurance Co. have lost an appeal in which they sought to enjoin Hannover Ruckversicherungs A.G. from starting arbitration proceedings to rescind reinsurance contracts with EMLICO. A London appeals court affirmed a lower court decision that an English court is not the appropriate forum for EMLICO's injunction request. . . .Jon C. Madonna, formerly chairman of KPMG International, the accounting firm's international umbrella organization, has been named vice chairman of the Travelers Group, with responsibilities that include the group's international business development. Mr. Madonna's responsibilities also include the personal lines divisions of the Hartford, Conn.-based Travelers/Aetna Property Casualty Corp. Mr. Madonna also has been named vice chairman of Traveler/Aetna Property Casualty Corp.