200.This section defines the expression “historical record” for the purpose of this Part of the Act. A historical record is a record which is thirty years old, counting from the calendar year following that in which it was created. Where records are kept in a file, the thirty years (and the other periods of years mentioned in section 63) are reckoned from the calendar year following that in which the most recent was created.
Commentary on Sections Part VI: Historical records and records in Public Record Office or Public Record Office of Northern Ireland Section 62: Interpretation of Part VI