Once the Convention has entered into force for the United States, the Secretary and DHS will preserve, or require the preservation of, Convention records for a period of not less than 75 years. For Convention records involving a child who is immigrating to the United States and Convention records involving a child who is emigrating from the United States, the 75-year period shall start on the date that the Secretary or DHS generates or receives the first Convention record related to the adoption of the child. For an intercountry adoption or placement for adoption involving two Convention countries other than the United States, the 75-year period shall start on the date that the Secretary or DHS generates or receives the first Convention record in connection with the performance of a Central Authority function.