(4) Temporary supervision of tandem spouse The Secretary shall update policies to allow for a tandem spouse to temporarily supervise another tandem spouse for up to 90 days in a calendar year, including at a United States diplomatic mission. (d) Report Not later than 90 days after the date of enactment of this Act, the Secretary shall submit to the appropriate congressional committees a report that includes— (1) the number of Foreign Service tandem couples currently serving