; (2) by redesignating subsection (b) as subsection (d); and (3) by inserting after subsection (a) the following: (b) Community vulnerability assessment (1) In general Not later than 180 days after the date of enactment of the Ocean-Based Climate Solutions Act of 2020 and every 7 years subsequent, the Secretary, through the Program , shall conduct an ocean acidification coastal community vulnerability assessment, and issue a corresponding public report. (2) Requirements The assessment conducted under paragraph (1) shall— (A) identify the United States coastal communities, including island communities, low-population rural communities, and subsistence communities, that are most dependent on coastal and ocean resources that may be impacted by ocean acidification; (B) assess the nature of the social and economic vulnerabilities of those communities, including the economic effect on local or regional commercial fisheries and recreational opportunities and over what timescales such effects will be felt; (C) identify the ocean acidification impacts that might harm those communities, both in isolation and in conjunction with other changing ocean conditions, including effects from changes in ocean and coastal marine resources that are not managed by the Federal Government; (D) identify key knowledge gaps where research could be devoted to better understand the possible impacts of ocean acidification on those communities, the risks and threats facing those communities, and possible adaptation strategies for those communities; and (E) be conducted in collaboration with experts, traditional knowledge experts, and individuals who are familiar with the unique economic, social, ecological, geographic, and resource concerns of coastal communities in the United States, including representatives from— (i) the National Marine Fisheries Service and the Office for Coastal Management of the National Oceanic and Atmospheric Administration