Summary Involvement in the political process in the United States is critical for social work professionals, as social policies dictate funding and programming in social work practice. Yet, there is little to no focus given to the regulation writing process in the social work literature in the United States. This article contributes to the scant body of knowledge that addresses the regulatory process from a social work perspective. A brief overview of the regulation writing process is provided, followed by a case study using the regulations for the U.S. Older Americans Act Long-Term Care Ombudsman Program to illustrate the process. Findings A total of 85 comments, submitted to the Federal Register docket, were analyzed using content analysis. Findings reveal that comment submissions varied greatly in terms of length, source, and input. Notably, findings indicate low participation from the social work profession. Application The open comment period of the regulation writing process offers a free, but effortful, window of opportunity for social workers to engage in post-legislative advocacy. There is a need to support the involvement of the social work profession in the regulation writing process, through practice and training enhancements.