Where the boundary usually sits
Food contact surfaces, preparation benches and equipment used during service are ordinarily cleaned by the kitchen as part of its own routine, because they need attention during and immediately after use rather than overnight. Floors, walls, extraction surrounds, waste areas, shelving and periodic deep tasks are more often contracted, since they suit an out-of-hours visit and specialist equipment. Whichever way the line falls, it should be written before the first shift rather than settled after the first inspection finds a surface nobody claimed.
That is a starting point rather than a rule. Some venues contract more, including bench and equipment cleaning after close; others contract only floors. What matters is that the answer is decided rather than inherited. A kitchen team that believes the cleaner does the splashbacks and a cleaner who believes the kitchen does them produces a surface that is cleaned by nobody, which is exactly the item a food inspection will find.
