(a) Periodic compliance reviews. The Secretary or his designee shall from time to time review the practices of recipients to determine whether they are complying with this part.

(b) Complaints. Any person who believes himself or any specific class of individuals to be subjected to discrimination prohibited by this part may by himself or by a representative file with the Secretary a written complaint. A complaint must be filed not later than 180 days from the date of the alleged discrimination, unless the time for filing is extended by the Secretary, or his designee.

(c) Investigations. Whenever a compliance review, report, complaint, or any other information indicates a possible failure to comply with this part, a prompt investigation shall be made. The investigation should include, where appropriate, a review of the pertinent practices and policies of the recipient, the circumstances under which the possible noncompliance with this part occurred, and other factors relevant to a determination as to whether the recipient has failed to comply with this part.

(d) Resolution of matters.

(e) Intimidatory or retaliatory acts prohibited. No recipient or other person shall intimidate, threaten, coerce, or discriminate against any individual for the purpose of interfering with any right or privilege secured by section 601 of the act or this part, or because he has made a complaint, testified, assisted, or participated in any manner in an investigation, proceeding, or hearing under this part. The identity of complainants shall be kept confidential except to the extent necessary to carry out the purposes of this part, including the conduct of any investigation, hearing, or judicial proceeding arising thereunder.