(c) Upon reasonable notice, conduct examinations of the books and records of postsecondary educational institutions and proprietary schools, and investigations of any person or any agent, wherever located, and as may be necessary and proper for the enforcement of the provisions of this chapter and the rules promulgated under the authority of this chapter. For these purposes, the director or his designated representative shall have free access to the offices and places of business or operations, books, accounts, papers, documents, other information, records, files, safes and vaults of all such persons or agents.