I have got some more information on how to assess ISO26000: Unlike other ISO standards, companies cannot acquire certification in ISO26000 to prove that they have observed its strictures. One way forward, however, is for a company to acquire an independent third party assessment of its practices in order to evaluate its performance with regard to its social responsibilities. (source: SGS/ Corporate responsibility)
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You quoted SGS in three out of your four posts. Are you in any way connected to them? Sorry to ask but our terms if service require those with vested interest to declare so.