What is this in Hindi?
That is not for you to decide.

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@momper yes u are right, but in this case, 'hai' is required.

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I was thinking that in the negative sentences it is not necessary the auxiiliar verb (excuse my bad English).

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bah tumhare nirnay karne ke liye nhi hai/बह तुम्हारे निर्णय करने के लिए नही है ।

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यह तुम्हारे तय करने के लिए नहीं है।

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@momper just a small correction यह तय करना* आपके लिए नहीं है*.