(a) This subtitle does not apply to fire–fighting foams used at the Baltimore–Washington International Thurgood Marshall Airport.
(b) This subtitle does not restrict:
(1) The manufacture, sale, or distribution of Class B fire–fighting foam that contains intentionally added PFAS chemicals; or
(2) The discharge or other use of Class B fire–fighting foam that contains intentionally added PFAS chemicals in emergency fire–fighting or fire prevention operations.