Conn. Gen. Stat. § 46a § 46a-82

(a) Any person claiming to be aggrieved by an alleged discriminatory practice, except for an alleged violation of section 4a-60g or 46a-68 or the provisions of sections 46a-68c to 46a-68f, inclusive, may, by himself or herself or by such person's attorney, file with the commission a complaint in writing under oath, except that a complaint that alleges a violation of section 46a-64c need not be notarized. The complaint shall state the name and address of the person alleged to have committed the discriminatory practice, provide a short and plain statement of the allegations upon which the claim is based and contain such other information as may be required by the commission. The commission whenever it has reason to believe that a person who is named as party to a discriminatory practice complaint has engaged or is engaged in conduct that constitutes a violation of part VI, of chapter 952, may refer such matter to the Office of the Chief State's Attorney and said office shall conduct a further investigation as deemed necessary. After the filing of a complaint, the commission shall provide the complainant with a notice that: (1) Acknowledges receipt of the complaint; and (2) advises of the time frames and choice of forums available under this chapter.

(b) The commission, whenever it has reason to believe that any person has been engaged or is engaged in a discriminatory practice, may issue a complaint, except for a violation of subsection (a) of section 46a-80.

(c) The commission, whenever it has reason to believe that any contractor or subcontractor is not complying with antidiscrimination statutes or contract provisions required under section 4a-60 or 4a-60g or the provisions of sections 46a-68c to 46a-68f, inclusive, may issue a complaint.

(d) The commission may issue a complaint if: (1) An affirmative action plan filed pursuant to section 46a-68 is in violation of any of the provisions of section 4-61u or 4-61w, sections 46a-54 to 46a-64, inclusive, section 46a-64c or sections 46a-70 to 46a-78, inclusive; or (2) an agency, department, board or commission fails to submit an affirmative action plan required under section 46a-68.

(e) Any employer whose employees, or any of them, refuse or threaten to refuse to comply with the provisions of section 46a-60 or 46a-81c may file with the commission a written complaint under oath asking for assistance by conciliation or other remedial action.

(f) (1) Any complaint filed pursuant to this section for an alleged act of discrimination that occurred prior to October 1, 2021, shall be filed within one hundred and eighty days after the date of the alleged act of discrimination, except that any complaint by a person (A) claiming to be aggrieved by a violation of subsection (a) of section 46a-80 that occurred before October 1, 2019, shall be filed within thirty days of the date of the alleged act of discrimination, and (B) claiming to be aggrieved by a violation of section 46a-60, sections 46a-70 to 46a-78, inclusive, or section 46a-80 or 46a-81c, that occurred on or after October 1, 2019, and prior to October 1, 2021, shall be filed not later than three hundred days after the date of the alleged act of discrimination.

(2) Any complaint filed pursuant to this section for an alleged act of discrimination that occurred on or after October 1, 2021, shall be filed within three hundred days after the date of the alleged act of discrimination.