For how long should records be kept according to PHS and AWRs?

The correct duration for which records should be retained according to the Public Health Service (PHS) Policy on Humane Care and Use of Laboratory Animals and the Animal Welfare Regulations (AWRs) is a minimum of three years. This requirement ensures that there is a sufficient timeframe for evaluating compliance and for the oversight of animal care and use involving federally funded studies.

Beyond the three-year period, it is essential to note that maintaining records longer may be beneficial for institutions for various reasons, including historical reference and internal audits, but PHS and AWRs stipulate the three-year benchmark as a minimum standard. This duration helps regulatory bodies ensure accountability and transparency in animal research practices.

While the other options suggest either shorter durations or indefinite retention, they do not align with the specific guidelines set forth by PHS and AWRs. Thus, three years serves as the foundational requirement that institutions must adhere to for proper record-keeping in relation to animal research activities.