MADISON, Wis. (AP) -- Nearly all of Wisconsin's Republican legislators signed legal agreements promising not to discuss new redistricting maps while they were being developed.

The agreement tells the lawmakers that they agree not disclose the contents of redistricting discussions or any draft documents they may possess.

Legislative leaders sometimes ask rank-and-file legislators to keep quiet about sensitive bills, but they typically don't ask them to sign non-disclosure agreements. Senate President Mike Ellis, a Neenah Republican, told the Journal Sentinel he had never before been asked to sign such an agreement during his 40 years in office.

Immigrant group Voces de la Frontera filed a complaint in Dane County on Monday that Republicans violated the state's open meetings law.