under which law does this come? and the answer?

My client sent a letter to it’s customer stating that a bank guarantee in my client’s favour should be extended, failing which the bank guarantee will be invoked on 1.4.17. The customer managed to get an order dated 29.3.17, restraining the invocation/encashment of the bank guarantee by my client. The order states nothing about whether the bank guarantees should be kept alive for the duration of the stay order restraining invocation. Have my client’s rights to extend the bank guarantee beyond 1.4.2017, now been extinguished? (The guarantees themselves are valid till 15.5.17.)