; or (ii) submit a report described in paragraph (1)(C). (B) Extensions (i) Voluntary extension agreed to between the secretary of labor and complainant If the Secretary of Labor is unable to complete an investigation under this subsection in time to submit a report within the 180-day period specified under subparagraph (A) and the individual submitting the complaint agrees to an extension of time, the Secretary of Labor shall submit a report described in paragraph (1)(C) within such additional period of time as shall be agreed upon between the Secretary of Labor and the individual submitting the complaint. (ii) Extension granted by the secretary of labor If the Secretary of Labor is unable to complete an investigation under this subsection in time to submit a report within the 180-day period specified under subparagraph (A), the Secretary of Labor may extend the period for not more than an additional 180 days without the individual submitting the complaint agreeing to such extension, if the Secretary of Labor provides to the individual and the non-Federal employer, if the employer is a defendant in the individual’s complaint a written explanation for the decision, from which the Secretary of Labor may exclude information in accordance with paragraph (4)(C). (3) Discretion not to investigate complaints (A) In general The Secretary of Labor may decide not to conduct or continue an investigation under this subsection upon providing to the individual submitting the complaint and the non-Federal employer, if applicable, a written explanation for such decision, from which the Secretary of Labor may exclude information in accordance with paragraph (4)(C). (B) Assumption of rights to civil remedy Upon receipt of an explanation of a decision not to conduct or continue an investigation under subparagraph (A), the individual submitting the complaint shall be deemed to have exhausted all administrative remedies with respect to the complaint for purposes of subsection (c), without regard to the 210-day period specified under