Cannot access a Master Organization from a different Legal Entity and a different BUsiness Group

Purchasing  Version : 12.1.3

Problem Description

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I cannot access a Master Organization which was created under a different  Legal Entity and a different Business Group and a different Operating  Unit. I want to have access to this same Master Organization  but I am working in a a different Legal Entity and under a different Business Group . Is there any setup missing or options for me to have this same Master organization. I want to define  some items under the same master item organization. We want ot share same Master organization.

Please advise how I achieve this task or if this can be done.