; (2) in consultation with local governments, judges, and legal services providers appropriate safeguards for protecting the privacy of personally identifiable information of vulnerable populations, which shall incorporate confidentiality measures to ensure that any personally identifiable information regarding a tenant who is a victim of domestic violence, dating violence, sexual assault, or stalking is not disclosed during the process of data submission and publication; (3) standards for— (A) external researchers to be granted permission to access data in the database, including both aggregate data and, if necessary for the conduct of their research, personally identifiable information, with appropriate safeguards to ensure identities are protected in any publicly released analysis; (B) the establishment of a research data center to support analysis of that data; and (C) using generally accepted statistical principles to validate the data, in consultation with outside participants; (4) methods for collecting data required under subsection (b) that are not currently collected; (5) establishing definitions for terms related to the eviction process based on how they are legally defined by courts of jurisdiction handling eviction cases