10 U.S.C. § 710a

(a) (1) Under regulations prescribed by the Secretary of Defense, a member of a reserve component of the armed forces described in subsection (b) is allowed parental leave for a duration of up to 12 inactive-duty training periods, under section 206 of title 37 , during the one-year period beginning after the following events: (A) the birth or adoption of a child of the member and to care for such child; or (B) the placement of a minor child with the member for adoption or long-term foster care. (2) (A) The Secretary concerned, under uniform regulations to be prescribed by the Secretary of Defense, may authorize leave described under paragraph (1) to be taken after the one-year period described in paragraph (1) in the case of a member described in subsection (b) who, except for this subparagraph, would lose unused parental leave at the end of the one-year period described in paragraph (1) as a result of— (i) operational requirements; (ii) professional military education obligations; or (iii) other circumstances that the Secretary determines reasonable and appropriate. (B) The regulations prescribed under subparagraph (A) shall require that any leave authorized to be taken after the one-year period described in paragraph (1) shall be taken within a reasonable period of time, as determined by the Secretary of Defense, after cessation of the circumstances warranting the extended deadline. (b) A member described in this subsection is a member of— (1) the selected reserve who is entitled to compensation under section 206 of title 37 ; or (2) the individual ready reserve who is entitled to compensation under section 206 of title 37 when attending or participating in a sufficient number of periods of inactive-duty training during a year to count the year as a qualifying year of creditable service toward eligibility for retired pay.