These interactions should occur in a timely manner and should include, but are not limited to,  the following:  - Communicating with the Testing  Authority  and/or Result s Management  Authority  concerning any significant question of Analytical Testing  needs or any unusual circumstance in the Analytical Testing  process (including delays in reporting);  - Providing complete, timely and unbiased explanations to the Testing  Authority  and/or Result s Management  Authority  when requested or when there is a potential for misunderstanding of any aspect of the Analytical Testing process, Laboratory  Test Report, Certificate of Analysis  or Laboratory Documentation Package ; - If requested by the Testing  Authority , the Laboratory  shall provide advice and/or opinion to the Testing  Authority  regarding the Prohibited Substances  and Prohibited Methods  included in the Analytical Testing  Procedures ; - Providing evidence and/or expert testimony on any test result or report produced by the Laboratory  as required in administrative, arbitration, or legal proceedings .