; (3) by redesignating clause (ii) as clause (iv); and (4) by inserting after clause (i) the following: (ii) Guidelines The Secretary of Health and Human Services shall establish guidelines for the conduct of home studies under clause (i) that include— (I) a deadline for completion of a home study that is not sooner than 15 calendar days after the date on which the home study is requested; (II) objective, publicly available criteria for releasing a child following a negative home study recommendation; and (III) requirements for individuals who conduct home studies, including at a minimum professional or educational knowledge related to child and adult development, cultural competence, trauma, parenting and family dynamics, and screening and identifying indicators of human trafficking. (iii) Report (I) In general Not later than 2 years after the date of the enactment of the Protecting Unaccompanied Children Act , and every 2 years thereafter, the Secretary of Health and Human Services shall report on the effectiveness of home studies conducted under clause (i). (II) Elements Each report required by subclause (I) shall include the following: (aa) An assessment of the effectiveness of such home studies in identifying safety concerns. (bb) For the preceding 2-year period— (AA) the number of home studies conducted and a description of the outcomes of such home studies, including whether or not each home study resulted in a positive or negative recommendation of the sponsor concerned; (BB) the number and type of safety concerns identified through such home studies