There are two levels to the properties criteria. Products that meet the more comprehensive requirements are held in the BASTA register. Products that only meet the more basic requirements are instead held in the BETA register and an environmental and health risk assessment is required for these products. Products in the BETA register should only be chosen after careful consideration.

The following demands are placed on suppliers:

• Declaration of contents.  The supplier must have detailed knowledge of the product´s chemical composition
• Supporting documentation for the assessment. The supplier must be able to provide documentation to support the assessment that the product meets the properties criteria
• Competence requirement. We demand that those who undertake the product assessment can demonstrate necessary competence in environmental and health assessments
• System audits. We undertake regular controls to ensure that participating suppliers follow the BASTA terms of qualification. During a system audit suppliers must be able to provide documentation that supports the product assessments.