The elected House of Commons is composed of 301 Members who represent constituents in all the ridings across Canada. Most of the laws passed by Parliament begin in the House of Commons. The work of Members of the House of Commons first and foremost includes representing the concerns of their constituents. Members also may serve on the committees of the House of Commons that consider bills before they become laws. Sometimes Members propose legislation as private members on matters they believe are important, but are not being considered by the government. Members also debate the merit of government bills, and work to amend bills they think can be improved. Sometimes Members will vote on constitutional change, such as the Meech Lake and the Charlottetown Accords.