Catalogue
Rule catalogue
The obligations by module, then by kind of building or activity. Each level opens in place; an open obligation gives its source, its timing as cited, its grade and who signs, where the record says.
The catalogue could not be read: only the published rules are shown.
No rule sets a date
For these obligations, no instrument sets a date or an interval: it is a finding of the source, and no countdown is kept. The reason is the grade's.