To combat child slavery in cocoa production, US Representative Eliot Engel introduced a legislative amendment to fund the development of a "no child slavery" label for chocolate products sold in the United States. Senator Tom Harkin proposed an addition to an agriculture bill to label qualified chocolate and cocoa products as "slave free".[46] It was approved in the House of Representatives by a vote of 291–115,[47] but before it went to the Senate the chocolate makers hired former senators George Mitchell and Bob Dole to lobby against it,[46] and it did not go to a vote.[47] Instead, the chocolate manufacturers reached agreement with the Congressmen to create the Harkin-Engel Protocol[48] to remove child slavery from the industry by July 2005.[46] The voluntary agreement was a commitment by industry groups to develop and implement voluntary standards to certify cocoa produced without the "worst forms of child labor,"[48] and was signed by the heads of major chocolate companies, Congressmen, the Ambassador of Côte d'Ivoire, and others concerned with child labor.[48]