Excerpt: Some employers would have to make additional contributions to their defined benefit plans to qualify for funding relief under a provision in a huge Senate tax and jobs bill. Lobbyists say the restrictions in the bill would make the relief -- through longer amortization periods for investment losses -- useless to employers, and they are working to water them down. The bill, the American Workers, State and Business Relief Act of 2010, is sponsored by Senate Finance Committee Chairman Max Baucus, D-Mont.