of such covered entities and commercial providers with, the corresponding provision of section 4 (including a related provision of the final rule issued under section 5(a)). (iii) Determination of violation If, after investigation or review under this subparagraph, the Attorney General determines that such a covered entity or commercial provider has violated the corresponding provision of section 4 (including a related provision of the final rule issued under section 5(a)), the Attorney General may take administrative action (including administrative resolution of a claim of such a violation) or bring a civil action in a district court of the United States. (B) Intervention If the Attorney General brings such a civil action based on a complaint filed by an individual, class of individuals, or entity, described in subparagraph (A), including a covered entity described in subparagraph (A) alleging a violation by a commercial provider, such individual, class, or entity shall have the right to intervene in such civil action. (2) Civil action by others An individual, class, or entity, described in paragraph (1)(A), including a covered entity described in paragraph (1)(A) alleging a violation by a commercial provider, may bring a civil action alleging a violation of paragraph (2) or (3) of subsection (a), or subsection (c), as the case may be, of section 4 (including a related provision of the final rule issued under section 5(a)) in an appropriate State or Federal court without first filing a complaint with the Department or exhausting any other administrative remedies. (b) Employment entities (1) Civil action by Commission and Attorney General (A) In general (i) Investigation after a complaint On receiving a complaint filed by a qualified individual, a class of qualified individuals, or an entity representing a qualified individual or such a class, of a violation of subsection (a)(1), or a complaint filed by an employment entity of a violation of subsection (c), of section 4 (including a related provision of the