Section 171.120 - Refresher Training Deadlines(A) Each first responder shall satisfactorily complete a refresher course in first aid, other than cardiopulmonary resuscitation, every three years after initial training in first aid.(B) Each first responder shall satisfactorily complete a refresher course in cardiopulmonary resuscitation every two years after initial cardiopulmonary resuscitation training.Amended by Mass Register Issue 1497, eff. 6/9/2023.