> For the complete documentation index, see [llms.txt](https://docs.rainbowstandard.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rainbowstandard.io/methodologies/biobased-construction-materials/version-history.md).

# Version history

<table data-full-width="true"><thead><tr><th width="369">Description of the change</th><th width="366">Justification</th><th width="141">Date</th><th>Version changed</th></tr></thead><tbody><tr><td>Short term removal credits (50-100 years) no longer an option</td><td>Short term removals have limited value in offsetting GHG emissions</td><td>23/10/2023</td><td>V1.0 to V1.1</td></tr><tr><td>Added equations for calculation GHG reductions</td><td>Increased transparency</td><td>29/01/2024</td><td>V1.1 to V2.0</td></tr><tr><td>Specified that building developers are eligible for carbon credits based on their use of biobased materials in their constructions</td><td>Expanding the scope to include other types of actors that are decisive in the sector</td><td>29/01/2024</td><td>V1.1 to V2.0</td></tr><tr><td>Aligned terminology with ISO 14064-2:2019</td><td>Improved consistency with the voluntary carbon market</td><td>29/01/2024</td><td>V1.1 to V2.0</td></tr><tr><td>Added risk assessment template for permanence and environmental and social do no harm</td><td>Provide more detailed and prescriptive assessment framework, clearer instructions for project developers</td><td>29/01/2024</td><td>V1.1 to V2.0</td></tr><tr><td><p>Removed text for sections that are the same for all methodologies:</p><ul><li>Measurability</li><li>Real</li><li>Additionality</li><li>Technology readiness level</li><li>Minimum impact</li><li>Independently verified</li></ul></td><td>Repeated text from the Standard Rules</td><td>29/01/2024</td><td>V1.1 to V2.0</td></tr><tr><td>Distinction between reference service lifetime (RSL) and carbon storage duration (CSD)</td><td>Two lifetimes must be differentiated for two purposes: CSD for permanence criteria, and RSL for GHG reduction calculations/substitution criteria</td><td>29/01/2024</td><td>V1.1 to V2.0</td></tr><tr><td>Added Monitoring Plan section</td><td>Alignment with Rainbow Standard Rules V6</td><td>13/03/2024</td><td>V2.0 (PC) to V2.0</td></tr><tr><td>Remove mentions of Rebound Effect and Independently Validated criteria</td><td>Alignment with Rainbow Standard Rules V6</td><td>13/03/2024</td><td>V2.0 (PC) to V2.0</td></tr><tr><td>Added uncertainty section</td><td>Alignment with Rainbow Standard Rules V6</td><td>13/03/2024</td><td>V2.0 (PC) to V2.0</td></tr><tr><td><p>Modifications in calculation approach:</p><ul><li>No longer subtract biogenic carbon from Module A for avoidance calculations</li><li>Removals now have emissions from Modules A1-A3 subtracted from removals</li></ul></td><td>More clearly and accurately represent avoided vs removed GHG emissions.</td><td>13/03/2024</td><td>V2.0 (PC) to V2.0</td></tr><tr><td>Renamed provision pool to buffer pool, and uncertainty buffer to discount factor.</td><td>Alignment with Rainbow Standard Rules V6 post public consultation.</td><td>17/5/2024</td><td>V2.0 to V2.1</td></tr><tr><td>Recommended discount factor changed from 10% to 6%.</td><td>Alignment with Rainbow Standard Rules V6 post public consultation.</td><td>17/5/2024</td><td>V2.0 to V2.1</td></tr><tr><td>Clarify that ancillary material emissions/removals are not considered in project removals, and distinguish between project biobased material and project scenario.</td><td>Clarification of the previous text’s intent.</td><td>August 2024</td><td>V2.1 to V2.2</td></tr><tr><td>Expanded description of guidelines for selecting baseline scenario plus examples</td><td>Transparency and documentation of our current practice</td><td>October 2024</td><td>V2.2 to V2.3</td></tr><tr><td>Added Project Scenario section</td><td>Consistent structure with other methodologies, exhaustive</td><td>October 2024</td><td>V2.2 to V2.3</td></tr><tr><td>Create project scope requirements</td><td>Specify that operations in different countries must be registered as separate projects</td><td>October 2024</td><td>V2.2 to V2.3</td></tr><tr><td>Add minimum list of ESDNH risks</td><td>Align with Standard Rules V6.2</td><td>October 2024</td><td>V2.2 to V2.3</td></tr><tr><td>Specify minimum frequency of updating baseline scenario</td><td>Clarity and transparency</td><td>October 2024</td><td>V2.2 to V2.3</td></tr><tr><td>Change scope of buildings using biobased materials to include multiple buildings</td><td>Facilitate certification for building developers</td><td>October 2025</td><td>V2.3 to V2.4</td></tr><tr><td>New rules for French building-scale projects to exceed building energy efficiency targets</td><td>To comply with <a href="https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000043966440">FR L229-55/R229-101</a>,</td><td>October 2025</td><td>V2.3 to V2.4</td></tr><tr><td>Add Auditing requirements table</td><td>Transparency, sharing resources that are already used in practice</td><td>October 2025</td><td>V2.3 to V2.4</td></tr></tbody></table>


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