s 4 Interpretation.
In this Act— . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The expression “ young person ” means a person who has ceased to be a child and who is under the age of eighteen years; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The expression “ industrial undertaking ” has the meaning assigned to it by Part I , . . . of the Schedule to this Act; The expression “ ship ” means any sea-going ship or boat of any description which is registered in the United Kingdom as a British ship and includes any British fishing boat entered in the fishing boat register.