ASTM E2718-16

4.2.1.1 Uncertainty Not Eliminated—Although a 4.2.1.2 Comparison with Subsequent Disclosures—Subsequent disclosures that convey different information regarding the extent or magnitude of the reporting entity's financial impacts attributed to climate change should not be construed as indicating the initial disclosures were inappropriate. Disclosures shall be evaluated on the reasonableness of judgments and inquiries made at the time and under the circumstances in which they were made. Subsequent disclosures should not be considered valid standards to judge the appropriateness of any prior disclosure based on hindsight, new information, use of developing analytical techniques, or other factors. However, information on trends between disclosure years may be of value to a user of financial statements.

4.2.1.3 Not Exhaustive—Appropriate disclosure does not necessarily mean an exhaustive disclosure. There is a point at which the cost of obtaining information or the time required to gather it outweighs the usefulness of the information and, in fact, may be a material detriment to the orderly preparation of financial statements and the ability of readers to understand the information contained therein. However, all relevant and reasonably ascertainable information should be used to determine the content of appropriate financial impacts attributed to climate change.