20Duty to notify changes
(1)For the purpose specified in subsection (2), notification regulations shall include provision imposing on every person in respect of whom an entry as a data controller is for the time being included in the register maintained under section 19 a duty to notify to the Commissioner, in such circumstances and at such time or times and in such form as may be prescribed, such matters relating to the registrable particulars and measures taken as mentioned in section 18(2)(b) as may be prescribed.
(2)The purpose referred to in subsection (1) is that of ensuring, so far as practicable, that at any time—
(a)the entries in the register maintained under section 19 contain current names and addresses and describe the current practice or intentions of the data controller with respect to the processing of personal data, and
(b)the Commissioner is provided with a general description of measures currently being taken as mentioned in section 18(2)(b).
(3)Subsection (3) of section 18 has effect in relation to notification regulations made by virtue of subsection (1) as it has effect in relation to notification regulations made by virtue of subsection (2) of that section.
(4)On receiving any notification under notification regulations made by virtue of subsection (1), the Commissioner shall make such amendments of the relevant entry in the register maintained under section 19 as are necessary to take account of the notification.