52.—(1) The undertaker must not begin to exercise the powers conferred by the provisions referred to in paragraph (2) in relation to any Order land unless it has first put in place either—
(a)a guarantee and the amount of that guarantee approved by the Secretary of State in respect of the liabilities of the undertaker to pay compensation pursuant to the provisions referred to in paragraph (2); or
(b)an alternative form of security and the amount of that security approved by the Secretary of State in respect of the liabilities of the undertaker to pay compensation pursuant to the provisions referred to in paragraph (2).
(2) The provisions are—
(a)article 25 (compulsory acquisition of land);
(b)article 28 (private rights);
(c)article 33 (temporary use of land for carrying out the authorised development);
(d)article 34 (temporary use of land for maintaining the authorised development); and
(e)article 35 (statutory undertakers).
(3) A guarantee or alternative form of security given in respect of any liability of the undertaker to pay compensation pursuant to the provisions referred to in paragraph (2) is to be treated as enforceable against the guarantor or person providing the alternative form of security by any person to whom such compensation is payable and must be in such a form as to be capable of enforcement by such a person.
(4) Nothing in this article requires a guarantee or alternative form of security to be in place for more than 15 years after the date on which the relevant power is exercised.