What are the grounds and procedure for recognition

What are the grounds and procedure for recognition

What are the grounds and procedure for recognizing individuals as interdependent and decide the following situation: the share of organization A in organization E is 10%, in organization C - 30% and 50% in organization B. In turn, organizations C and B participate in organization E as 50% and 40%.
Determine the share of participation of organization A. in other organizations in accordance with tax legislation.

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