Section 3. Limitation of application

1[ 3. Limitation of application. —Nothing in this Act shall apply to— (a) locomotive boilers belonging to or under the control of the railways; (b) any boiler or boiler component,— (i) in any vessel propelled wholly or in part by the agency of steam; (ii) belonging to, or under the control of, the Army, Navy or Air Force; or (iii) appertaining to a sterilizer disinfector used in hospitals or nursing homes, if the boiler does not exceed one hundred liters in capacity.]