The Association, the Secretary, and the Comptroller General of the United States, or any of their duly authorized representatives shall, until the expiration of 3 years after the implementation of the final system plan, have access for the purpose of audit and examination to any books, documents, papers, and records of such recipients which in the opinion of the Association, the Secretary, or the Comptroller General may be related or pertinent to the loans, obligations or other arrangements referred to in subsection (a) of this section. The Association or any of its duly authorized representatives shall, until any financial assistance received under this subchapter has been repaid to the Association, have access to any such materials which concern any matter that may bear upon—