Eastern States Health and Welfare Fund of the Union of Needletrades, Industrial and Textile Employees, New York, filed suit in U.S. District Court in Newark, N.J., challenging Chubb Corp.s refusal to allow a proxy vote on a binding bylaw amendment that would require shareholders to vote on the companys ability to implement a poison pill anti-takeover provision. The employee benefit fund seeks injunctive relief to ensure the shareholder resolution is included in the proxy statements. The resolution seeks to amend Chubbs bylaws to require shareholder approval before the company can adopt or maintain a poison pill. The fund, with $200 million in assets, owns 11,900 shares of Chubb, based in Warren, N.J. Hillary Horn, UNITE director-corporate and financial affairs, said Chubb in April allowed on the proxy a similar shareholder resolution that was proposed by the fund. It received 71% of the shares voted. Despite the majority support, the company declined to implement the bylaw. A month earlier, in March, the companys board had adopted a 10-year poison pill. A Chubb spokeswoman said company officials dont comment on lawsuits.