The Tanzania Revenue Authority (TRA) has no contractual relationship with any firm in its decision requiring businessmen to have electronic cash register (ECR) machines. TRA Director for Taxpayer Education, Protas Mmanda, said in Dar es Salaam that businessmen were free to buy ECRs machines from anywhere in the world provided they meet TRA specifications. He was reacting to allegations raised by one "disappointed businessman" that TRA was promoting ECRs being sold by a company he did not name.