Update re: Status of Review of I.S. 465, March 2026

The NSAI confirms that the relevant Technical Committee has been meeting weekly to finalise the revision of I.S. 465 and is now approaching the conclusion of its deliberations.

While significant progress has been made, discussions have proven more complex than initially anticipated, in particular, new observations relating to the key topic of remediation. The Technical Committee has determined that these recent inputs are of substantial importance and that further consideration is necessary to ensure the most robust and effective outcome, informed by the best available data and scientific evidence, in the interests of all stakeholders.

While NSAI had previously indicated that the full revision of I.S. 465 was expected to be concluded by the end of Q1 2026, the additional analysis and meetings required have resulted in a short delay of a number of weeks beyond this timeframe.

The NSAI acknowledges that this delay is disappointing. However, it reflects the Committee’s commitment to a thorough, evidence-based process and to delivering a standard that is both effective and durable. The urgency of concluding the remaining deliberations as quickly as possible, while maintaining due diligence, is fully recognised.

The NSAI continues to apply every possible efficiency to ensure that each phase of the standards development process progresses as quickly as possible, while safeguarding the integrity and quality of the final standard.