Enacts new GS 131D-10.7A requiring the Department of Health and Human Services, Division of Social Services, under rules adopted by the Social Services Commission, to enforce a policy prohibiting a foster parent from smoking in a private home used to provide licensed foster care to infants. Also requires the policy to prohibit a foster parent from smoking in the presence of an infant in the person's care while they are in a motor vehicle and requires the foster parent to prohibit others from smoking in the presence of an infant. Makes conforming changes to the Social Services Commission's duties in GS 131D-10.5.