What the rules are protecting
A centre after close is a large building full of unattended value with very few people in it. Most conduct rules exist because something has happened somewhere: property gone missing, a tenancy left insecure, an area entered that should not have been, an incident that took days to reconstruct because nobody could establish who had been where. The rules are the accumulated response to those events.
Understanding that makes them easier to follow and easier to explain to a cleaner. A rule against entering tenancies not on the cleaning list is not an insult to the individual; it is a boundary that protects them as much as the centre. A cleaner who was demonstrably never in an area cannot be part of any question about it, and that clarity works in everyone's favour. It also gives a contractor something clear to brief, since a rule explained with its reason is followed more consistently than one presented as a restriction.
