45 C.F.R. § 155.120

(a) Non-interference with Federal law. An Exchange must not establish rules that conflict with or prevent the application of regulations promulgated by HHS under subtitle D of title I of the Affordable Care Act.

(b) Non-interference with State law. Nothing in parts 155, 156, or 157 of this subchapter shall be construed to preempt any State law that does not prevent the application of the provisions of title I of the Affordable Care Act.

(c) Non-discrimination. (1) In carrying out the requirements of this part, the State and the Exchange must:

(i) Comply with applicable non-discrimination statutes; and

(ii) Not discriminate based on race, color, national origin, disability, age, or sex (which includes discrimination on the basis of sex characteristics, including intersex traits; pregnancy or related conditions; sexual orientation; gender identity; and sex stereotypes).

(2) Notwithstanding the provisions of paragraph (c)(1)(ii) of this section, an organization that receives Federal funds to provide services to a defined population under the terms of Federal legal authorities that participates in the certified application counselor program under § 155.225 may limit its provision of certified application counselor services to the same defined population, but must comply with paragraph (c)(1)(ii) of this section with respect to the provision of certified application counselor services to that defined population. If the organization limits its provision of certified application counselor services pursuant to this exception, but is approached for certified application counselor services by an individual who is not included in the defined population that the organization serves, the organization must refer the individual to other Exchange-approved resources that can provide assistance. If the organization does not limit its provision of certified application counselor services pursuant to this exception, the organization must comply with paragraph (c)(1)(ii) of this section.