How does “Who sees what” work on the Tracking & Project Codes page?

The Project Codes list opens to the project view key, so a site or commercial reader can look a code up; everything else on the page — the matrix, Duplicates, the pushes — rides the Accounts view key and the writes need the Admin or Accounts role. Main Projects opens on its own key as well, so an Accounts user whose module list omits HR still reaches the one editor. Where: Tracking & Project Codes (/accounts/tracking-harmonisation).