Can an irrevocable trust make gifts to a 3rd party ?

I am the trustee of irrevocable trust for my nephew. He is the sole beneficiary of the trust.  In 2019, he directed me to make a gift of $30,000 from his trust to his mother.   This gift is from corpus (principal) and not income.   Does the trust have to file a Form 709 gift tax return for this gift ?   I don't think a Form K-1 has to be filed, because no income was transferred.