Rules about closure periods were written when most sensitive records were paper files with one identifiable author. Digital records combine messages, metadata and automated decisions whose risks do not expire together. I apply the old principle of preventing foreseeable harm, but not the old calendar mechanically.
Every exception is documented so that flexibility does not become personal discretion without review. Inheritance is a starting obligation, not a reason to stop interpreting. Whenever I depart from a standard closure period, the file begins with the harm the rule was intended to prevent.
I then record why the particular material changes that risk and who reviewed the exception. A later archivist can apply the principle to a new digital record without copying my timetable, while still seeing whether flexible judgement has drifted into unexamined personal preference. For each exception I record the public interest that justified it and the date on which that reasoning should be reconsidered.
Flexibility without such a trail can quietly become unequal treatment, even when every individual choice once seemed sensible.