2.2 Level of Information Provision within Safety Case All safety cases prepared and submitted to the CER under the Act are required to be prepared in accordance with these Guidelines In respect of a designated petroleum activity or activities, each safety case must at least contain such particulars as are specified in these Guidelines as relating to that activity. 18 Although these Guidelines provide guidance on the appropriate contents of safety cases, they do not give absolute instructions on the information required for every safety case as each combination of designated petroleum activity or activities, petroleum infrastructure and location is unique. It is the responsibility of the petroleum undertaking to provide a well- structured and coherent safety case which demonstrates that the petroleum undertaking is capable of implementing the SMS described in the safety case, of carrying on petroleum activities in compliance with the General Duty and which provides sufficient information to allow judgement by the CER of whether the safety case complies with the Act and is consistent with the Guidelines. Petroleum undertakings need to provide sufficient information so that the safety case can be understood and assessed in the appropriate context. Data sources should be referenced, or their source identified in the safety case. The level of information provided should be appropriate, which will vary according to the lifecycle stage excessive detail may serve to unintentionally obscure the argument for safety within a safety case.