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To this end, permission is granted to use such copyrighted material solely for non-commercial, instructional, personal, or scholarly purposes. The material may be used and incorporated into other workplace safety and health programs on the condition that no fee may be charged for the subsequent use of the material. Use of the material for any other purpose, particularly commercial use, without the prior, express written permission of the copyright owner/s is prohibited. Furthermore, any modification to the material is prohibited without the prior, express written permission of the copyright owners.