The department shall provide to any interested person program and financial information and interpretation concerning the operation of the program, except that confidential information concerning any applicant, trainee, licensee or vendor shall not be released directly or indirectly without written permission of such applicant, trainee, licensee, or vendor as specified in 34 C.F.R., 361.49; chapter 42.17 RCW and attendant regulations; and department policy B-21.