Section 5-C:46 - Marriage of Step-Children and Adopted ChildrenI. The division shall issue a marriage certificate for step-siblings in a family if the natural parents of each child had no biological connection to each other closer than cousin.II. The division shall issue a marriage certificate to an adopted brother and an adopted sister in the same family, unless they are also related biologically as specified in RSA 457:2. 2005, 268:1. 2009, 59:8, eff. Jan. 1, 2010.