Any party in interest may be permitted to examine the record of the case in which he is interested. The official custodian of the record sought to be inspected shall permit or deny inspection in accordance with the Department of Labor's regulations pertaining thereto (see 29 CFR part 70). The original record in any such case shall not be removed from the office of the custodian for such inspection. The custodian may, in his discretion, deny inspection of any record or part thereof which is of a character specified in 5 U.S.C. 552(b) if in his opinion such inspection may result in damage, harm, or harassment to the beneficiary or to any other person. For special provisions concerning release of information regarding injured employees undergoing vocational rehabilitation, see § 702.508.