(1) In section 53 of the Regulation of Investigatory Powers Act 2000 (c. 23) (offence of contravening disclosure requirement)-

(a) in paragraph (a) of subsection (5), for "two years" substitute "the appropriate maximum term"; and

(b) after that subsection insert the subsections set out in subsection (2).

(2) The inserted subsections are-

"(5A) In subsection (5) 'the appropriate maximum term' means-

(a) in a national security case, five years; and

(b) in any other case, two years.

(5B) In subsection (5A) 'a national security case' means a case in which the grounds specified in the notice to which the offence relates as the grounds for imposing a disclosure requirement were or included a belief that the imposition of the requirement was necessary in the interests of national security."

(3) This section does not apply to offences committed before the commencement of this section.