When was the law passed on canceling the 10-month period for joining ...?

Currently, there is no legal act in the legislation of Ukraine that cancels the 10-month period for accepting or rejecting an inheritance.

The period for accepting inheritance or refusing to accept it is suspended for the duration of martial law, but for no more than 4 months.

That is, 4 more months are added to the total of 6 months for the acceptance of inheritance, a total of 10 months (but in the event of the termination or cancellation of martial law, the term for acceptance (rejection of) inheritance may be less than 10 months.