155.—(1) The conditions mentioned in Article 154(1)(c) and (2)(c) are satisfied in relation to a requirement for the provision of a public sewer or, as the case may be, lateral drain by a sewerage undertaker if—
(a)such undertakings as the undertaker may have reasonably required in accordance with paragraph (2) have been given by the person or persons who have required the provision of the sewer or lateral drain; and
(b)such security as the undertaker may have reasonably required has been provided for the discharge of any obligations imposed by those undertakings on any person who, under paragraph (3) , may be required to secure his undertakings.
(2) The undertakings which a sewerage undertaker may require for the purposes of paragraph (1) in respect of any public sewer or lateral drain are undertakings which—
(a)bind the person or persons mentioned in that paragraph to pay to the undertaker the reasonable costs of providing that sewer or lateral drain, as determined in accordance with the undertaker’s charges scheme; and
(b)in the case of undertakings binding two or more persons, bind them either jointly and severally or with liability to pay apportioned in such manner as they may agree.
(3) For the purposes of paragraph (1)(b) a person may be required to secure his undertakings in relation to the provision of a public sewer or, as the case may be, lateral drain if he is not a public authority.
(4) Where for the purposes of paragraph (1)(b) any sums have been deposited with a sewerage undertaker by way of security for the discharge of any obligation, the undertaker shall pay interest at such rate as may be determined either—
(a)by the undertaker with the approval of the Authority; or
(b)in default of a determination under sub-paragraph (a), by the Authority,
on every sum so deposited for every three months during which it remains in the hands of the undertaker.
(5) An approval or determination given or made by the Authority for the purposes of paragraph (4)—
(a)may be given or made in relation to the provision of a particular public sewer or lateral drain, in relation to the provision of public sewers or lateral drains of a particular description or in relation to the provision of public sewers or lateral drains generally; and
(b)may be revoked at any time.
(6) Any dispute between a sewerage undertaker and any other person as to—
(a)the undertakings or security required by the undertaker for the purposes of this Article; or
(b)the amount required to be paid in pursuance of any such undertaking,
may be referred to the Authority for determination under Article 61 by either party to the dispute.