JESS has been developed jointly by the authors, Dr Peter M May, Dr Darren Rowland and Dr Kevin Murray.

JESS is presently jointly owned by Mayhem Unit Trust (Australia) and NALCO, an Ecolab company (United States of America).

All rights, including copyright, are reserved. Access may be withdrawn at the discretion of the owners. Liabilities are limited to the full extent permitted by law.

Use of JESS indicates acceptance of an agreement by you that JESS material will not be copied by you (in whole, or in part). Please acknowledge your use of JESS by appropriate citations of our publications and/or this website.

JESS is frequently made available for non-commercial use by third parties under a licence agreement.