Versions of 36 CFR Part 68 - The Secretary of the Interior\'s Standards for the Treatment of Historic Properties on LawServer 2024 36 CFR Part 68 – The Secretary of the Interior’s Standards for the Treatment of Historic Properties 2023 36 CFR PART 68 – THE SECRETARY OF THE INTERIOR’S STANDARDS FOR THE TREATMENT OF HISTORIC PROPERTIES 2022 36 CFR Part 68 – The Secretary of the Interior’s Standards for the Treatment of Historic Properties 2021 36 CFR Part 68 – The Secretary of the Interior’s Standards for the Treatment of Historic Properties 2020 36 CFR Part 68 – The Secretary of the Interior’s Standards for the Treatment of Historic Properties