60.—(1) The registration officer may, at such times as he thinks fit, make inquiries of a person–
(a)who is shown as voting by proxy in the record kept under paragraph 3(4) of Schedule 4 in pursuance of an application granted on the grounds set out in paragraph 3(3)(b) and (c) of that Schedule; or
(b)who immediately before the date of the commencement of Schedule 4 was entitled to vote by proxy for an indefinite period at parliamentary elections, local government elections or both in pursuance of an application granted on grounds corresponding to those set out in paragraph 3(3)(b) and (c) of Schedule 4 (physical incapacity, blindness, occupation, service or employment),
for the purpose of determining whether there has been a material change of circumstances.
(2) Where the grant of an application for a proxy vote for an indefinite or particular period was based on the grounds referred to in paragraph 3(3)(c) of Schedule 4 (or grounds corresponding to those grounds), the registration officer shall make the inquiries referred to not later than three years after the granting of the application or the last such inquiries, as the case may be.
(3) The registration officer may treat the failure by a person of whom inquiries have been made to respond to such inquiries within one month of the date on which they were made as sufficient evidence of a material change in circumstances.