In—
(a) an Act; or
(b) a subordinate instrument within the meaning of the Interpretation of Legislation Act 1984 ;
(c) any document whatever—
in relation to any period occurring on or after the commencement of this section and, unless inconsistent with the context or subject matter, a reference to the Firearms Act 1958 must be taken to be a reference to the Firearms Act 1996 .