It states (click picture to enlarge image) that the premises require 24 access.
I suppose it means 24 hour access, but nevertheless, it doesn’t actually state that.
It is unclear what 24 access could mean.
I would suggest that it means there was no proof-reading when the sign was created.
Things are getting worse when large public signs, which must cost significant amounts of money, are not checked for spelling, grammar and meaning. This sort of thing cries out for someone to park there, just to see what happens.