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Hazardous Substances & New Organisms (HSNO) Codes of Practice
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Hazardous Substances & New Organisms (HSNO) Codes of Practice

Codes of practice are documents that offer an approved method of achieving compliance with regulatory requirements.  A code of practice will tell you how to meet the Hazardous Substances and New Organisms (HSNO) Act regulation requirements and controls in a way that is legally defensible. However, they are not mandatory and you can adopt other ways of meeting the requirements instead.

Some organisations may charge for a code of practice they have developed. These codes have an information sheet available here. Codes of practice that are available free of charge are listed here as a pdf.

Superseded codes of practice are documents which were approved but have been replaced with newer versions.

For those who have buildings or equipment made under these previous codes, they could be of use to you.

These superseded codes are still available to read however, bear in mind that due to changes in the HSNO Act these codes may now not be compliant, so new buildings and equipment must be made to the standard of the current codes of practice.

Codes of practice originally developed by other organisations, such as the Environmental Protection Authority (EPA), will retain that organisation's markings until replaced or revoked.



On Monday 4 April 2016, the New Health and Safety at Work Act 2015 (HSWA) came into effect.

HSWA repeals the Health and Safety in Employment Act 1992, with immediate effect.

All references to the 1992 Act on this website and within our guidance will be progressively removed.