(1)In this Part of this Act, except in so far as the context otherwise requires, the following expressions have the meanings hereby respectively assigned to them, that is to say:—
" certificate ", in relation to an officer authorised by the Authority to exercise any power conferred by this Act, means any duly authenticated document showing his authority to do so;
" contravene " includes fail to comply with and " contravention " has a corresponding meaning;
" fish " includes shellfish ;
" prescribed " means prescribed by regulations of the Authority;
" processing ", in relation to fish, includes preserving or preparing fish, or producing any substance or article wholly or partly from fish, by any method for human or animal consumption;
" products ", in relation to fish, means anything produced by processing the fish ;
" scheme " means a scheme under section 7 of this Act;
" white fish industry " means the white fish industry in Great Britain; and, without prejudice to section 17(8) of this Act, a person shall be deemed to engage in the white fish industry if he carries on the business of operating vessels to which this Part of this Act applies for catching or processing white fish or for transporting white fish or the products of white fish, or if he carries on in Great Britain the business of selling white fish by wholesale or by retail or of processing white fish (including the business of a fish fryer).
(2)Any reference in this Part of this Act to a vessel to which this Part of this Act applies is, subject to subsection (3) below, a reference to a vessel which either—
(a)being registered in Great Britain is for the time being employed in the business of catching or processing sea fish or transporting sea fish or the products of sea fish, or
(b)not being registered in Great Britain, is for the time being employed in the business of making voyages for the purpose of catching or processing sea fish, or transporting sea fish or the products of sea fish where (in any such case) it is part of the purpose of the voyage that the fish or the products of the fish are to be landed in Great Britain, whether by the vessel which caught them, or by another vessel.
(3)For the purposes of the application of subsection (2) above to any enactment contained in this Part of this Act which relates to the provision, acquisition or equipment of vessels, paragraphs (a) and (b) of that subsection shall apply with the substitution, for the word " registered " , of the words " intended to be registered ", and for the words " is for the time being employed of the words " is to be employed ".