"supervisory instruments" is correct and usable in written English.
You can use it to refer to tools or methods used to monitor and/or control the work of others. For example, "The manager used a variety of supervisory instruments to ensure that the employees were following protocols."
They add that during any transition deal bridging Britain's departure and the beginning of the new relationship, the EU's "existing regulatory, budgetary, supervisory, and enforcement instruments and structures" must apply.
Use of online analytical instruments, supervisory control and data acquisition (SCADA) systems, and dedicated software have resulted in automation and computerization of treatment processes with the provision for remote operations.
Should a time-limited prolongation of Union acquis be considered, this would require existing Union regulatory, budgetary, supervisory and enforcement instruments and structures to apply.
However, as per the European Commission's guidelines, this transitional agreement would require "existing Union regulatory, budgetary, supervisory and enforcement instruments and structures to apply".
To put it in the formal language of the European Council's Article 50 negotiating guidelines: "Should a time-limited prolongation of Union acquis be considered, this would require existing Union regulatory, budgetary, supervisory, judiciary and enforcement instruments and structures to apply". The details of what that means are difficult for some Brexit supporters in the UK to stomach.
To make it even patchier, for older financial instruments, the national supervisory authorities decide on equivalence.
Various aspects of this debate are being carefully considered, such as, for example, the questions of whether a common supervisory authority for all the instruments of the Third Pillar should be created or whether it would be sensible to create a common secretariat for these authorities.
These standards include requirements for trained and competent supervisory and testing personnel, for record keeping and instrument maintenance, for daily quality control practices, for result reporting, and for laboratory inspection and maintenance.
Bureaucratic, supervisory, fiscal and legal mechanisms have been supplemented by newer market, peer and reputational instruments for holding power-wielders and those with less power to account for their actions [ 12].
Supervisory responsibilities were too fragmented.
