text: The compliance of enterprises with OSH regulations is**supervised by state institutions, mainly the**
  **Labour Inspectorates**.363 At EU level, the SLIC developed common principles for their work. These 
  common principles aim at harmonising their work and facilitate collaboration; they include planning and 
  monitoring, inspectors’ competencies and independence, prevention, protection, and assistance and 
  guidance for inspectors, and internal and external communication.364 
  
  Practically all labour inspections in the EU Member States worked in the past two decades on 
  **organisational and strategic measures to achieve an effective and broad impact**, and also to better 
  adapt to new and emerging risks.365 To enhance the level of implementation in terms of coverage and 
  quality, many labour inspections developed**smart enforcement**and**supervision concepts**.366 
  
   On average, two million visits per year were made by labour inspectorates, in approximately 22 million 
  businesses in the EU, in the decade 2010-2020, with a steady decline over the years.367 .368 Many 
  enterprises that are regarded as low-risk establishments have never been inspected by a labour 
  inspectorate. Often more than one inspection is done in large enterprises, for example, as a follow-up 
  inspection; there might also be more than one annual inspection in enterprises with high risks. The 
  labour inspection is also tasked to supervise enterprises with many separated sites or establishments, 
  for example, construction companies and shops of supermarket chains. The visit of one headquarter or 
  one shop cannot be regarded as a visit of a representative selection of enterprises’ locations, which 
  possibly show different levels of safety and health. 