Field Validate Required Enable/Disable by js

I want to make a field as required or not based on the value of another field

I have a field called "status"(dropdown) with the values ​​yes and no.

When i select yes, this parent field called "Início V.", should be required, when i select no, should bt not required(remove validation)

The big problem is: I’m use tabular input. See the image

Someone can help me?