Applicants, contractors, and subcontractors shall maintain such books, accounts, and records and shall file with the Department such financial and other reports as the Department may from time to time require. All of these books, accounts, and records shall be open to the inspection of representatives of the Department or other agencies of the State during reasonable working hours. Books, accounts, and records of contractors and subcontractors shall be maintained and made available for inspection for 3 years past the date of termination of the contractual relationship between the contractor and the applicant.