Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 167F, § 10

A bank may or in participation with a federal bank, a foreign bank, an out-of-state bank or an out-of-state federal bank, as defined in section 1 of chapter 167 invest in, establish, operate or subscribe for services from another bank, federal bank, foreign bank, out-of-state bank or out-of-state federal bank or a subsidiary thereof or any other business entity for the purpose of obtaining for or furnishing to the bank technology, trust services, financial planning, compliance, internal audits, human resource or other operation functions, management or staff generally required by a bank.