Senator McGRATH (Queensland—Assistant Minister to the Prime Minister) (16:27): by leave—I move: That Senators be discharged from and appointed to committees as follows: Economics References Committee— Appointed— Substitute member: Senator Patrick to replace Senator Whish-Wilson for the committee's inquiry into the future of Australia's naval shipbuilding industry Participating member: Senator Whish-Wilson Electoral Matters—Joint Standing Committee— Appointed—Participating member: Senator Leyonhjelm [for matters relating to Section 44 of the Constitution only] Foreign Affairs, Defence and Trade References Committee— Appointed— Substitute member: Senator Whish-Wilson to replace Senator Patrick for the committee's inquiry into the implications of climate change for Australia's national security Participating member: Senator Patrick National Broadband Network—Joint Standing Committee— Discharged— Senator Hanson-Young Participating member: Senator Steele-John Appointed— Senator Steele-John Participating member: Senator Hanson-Young Rural and Regional Affairs and Transport References Committee— Appointed— Substitute member: Senator Steele-John to replace Senator Rice for the committee's inquiry into the regulation of mobility scooters Participating member: Senator Rice Question agreed to.