ȯ reviewing relevant documents and records on a sample basis; ȯ testing and re-calculating information related to the selected information on a sample basis; ȯ assessing the information for consistency with our knowledge of TELUS operations, including comparing TELUS’ assertions to publicly available third-party information; and ȯ assessing the selected quantitative information noted in Appendix A and TELUS’ self-declaration that it has met the Core level of conformance with the Global Reporting Initiative (GRI) Sustainability Standards 2016 (GRI Standards) requirements.