         Sentence: 4: The: provision réquires:the secretary ‘of. Health ‘and  Humari Services (-riews - web’sites j to certify that the importation  can he‘otie Safely aid willbe cost-effective,    Seitencé 2: But the measure also. requires, the Secretary of health  and human seivces-to‘certifythat the ‘smporation can, be done.  safely