Mass. Gen. Laws ch. 183A, § 7: Contribution toward common expenses; liability; offset, deduction, or waiver prohibited

Section 7. No unit owner may exempt himself from liability for his contribution toward the common expenses by waiver of the use or enjoyment of any of the common areas and facilities or by abandonment of the unit or otherwise; and no unit owner shall be entitled to an offset, deduction, or waiver of common expenses or other charges levied or lawfully assessed by the organization of unit owners.