How does law change society? To gain new leverage on this long-standing question, this article draws on two lines of research that often ignore each other: political science research on the mobilization of law, and sociological research on the diffusion of organizational practices. Our insights stem from six case studies of diverse organizations' responses to the accommodation provisions in the Americans with Disabilities Act and related state laws. We found that different modes of exposure to the law combined with organizational attributes to produce distinct “rights practices”—styles of standard operating procedures and informal routines that reflect the understanding of legal requirements within an organization. The diversity of the organizational responses challenges simple dichotomies between compliance/noncompliance, change through deterrence/change through norms, and mobilization/nonmobilization, and it underscores the importance of combining political science and sociological perspectives on law and social change.