Mass. Gen. Laws ch. 151A, § 26: Unemployment benefits received or sought under laws of another state or United States

Section 26. No waiting period shall be served and no benefits shall be paid under this chapter to an individual for any week with respect to which, or a part of which, he has received or is seeking unemployment benefits under an unemployment compensation law or employment security law of any other state or of the United States; provided, that, if the appropriate agency of such other state or of the United States finally determines that he is not entitled to such unemployment benefits, this section shall not apply.