The Constitution provides that Members of Cabinet are accountable collectively and individually to Parliament and must provide Parliament with full and regular reports concerning matters under their control. Parliament may pass national legislation to regulate the manner in which executive proclamations, regulations and other instruments of subordinate legislation must be tabled and approved in Parliament. Parliament must maintain oversight over all security services. Through national legislation, Parliament must establish a treasury and prescribe measures to ensure both transparency and expenditure control in each sphere of government, including the remuneration of persons holding public office. National legislation must also regulate the South African Reserve Bank, the imposition of provincial taxes and establish structures to facilitate intergovernmental relations and settlement of intergovernmental disputes. Parliament must approve international agreements unless these are of a technical, administrative or executive nature. International agreements become law in South Africa only when enacted into law by national legislation, except self-executing provisions of an agreement.