For someone to have the obligation to maintain equipment, it must normally be within their power to be able to do so without obtaining someone else’s consent (Smith v Northamptonshire County Council [2008] EWCA Civ 181). PUWER also contains specific requirements regarding: dangerous parts of machinery; protection against particular hazards; high or low temperatures; control systems and devices; isolation from sources of energy; stability; lighting; maintenance operations; and markings and warnings.