The Parliamentary Service "was established by the Parliamentary Service Act 1985 and continues under the provisions of the Parliamentary Service Act 2000.
The Service is accountable to the Speaker of the House of Representatives, who acts as the responsible Minister and determines the services that it provides to members and the House. The Parliamentary Service is not a Government department, but is part of New Zealand’s wider State sector." (website)
The operations of the Service facilitate "New Zealand’s democracy by providing administrative and support services to the House of Representatives and to members of Parliament. It also administers funding entitlements that enable members of Parliament to perform their role effectively.
It also delivers services to the public, and to the other agencies on the Parliamentary precinct: Office of the Clerk of the House of Representatives, Parliamentary Counsel Office, Department of the Prime Minister and Cabinet, and the Department of Internal Affairs’ Ministerial and Secretariat Support Services.
It administers services and members’ funding entitlements in accordance directions given by the Speaker of the House.” (website)
The Parliamentary Service is also responsible for the built environment of the Parliamentary Precinct including the public art on display.