When a charge is filed under section
3610 of this title, a complainant, a respondent, or an aggrieved person on whose behalf the complaint was filed, may elect to have the claims asserted in that charge decided in a civil action under subsection (o) of this section in lieu of a hearing under subsection (b) of this section. The election must be made not later than 20 days after the receipt by the electing person of service under section
3610
(h) of this title or, in the case of the Secretary, not later than 20 days after such service. The person making such election shall give notice of doing so to the Secretary and to all other complainants and respondents to whom the charge relates.