(1) Any agreement consisting only of a network code together with any agreement which contains restrictions or information provisions only relating to a requirement to abide by or to implement the code.
(2) Any agreement which incorporates terms of a network code and which contains restrictions or information provisions only relating to that code.
(3) Any agreement, other than one falling under sub-paragraph (2) above, required by or expressly envisaged by a network code for the purpose of giving effect to that code.
(4) Any claims validation agreement.
(5) The condition which must be satisfied by an agreement of a description specified in sub-paragraph (1), (2), (3) or (4) above is that—
(a) it is in the terms of a draft of which a copy is, on or before the appointed day, approved, by notice in writing given to the party providing it, by the Director as satisfying the criterion specified in sub-paragraph (6) below; or
(b) if made on or before the appointed day, it contains a provision that any restrictions or information provisions which it contains shall not take effect until after the Director approves, by notice in writing given to the party providing it, the agreement as satisfying the criterion specified in sub-paragraph (6) below; or
(c) it is in the terms of a draft of which a copy is provided to the Director at least 42 days before the date on which the agreement is made and within 28 days the Director does not give notice in writing, to the party providing it, that he does not approve the agreement because it does not satisfy the criterion specified in sub-paragraph (6) below; or
(d) it contains a provision that any restrictions or information provisions which it contains shall not take effect—
(i) if a copy of the agreement is not provided to the Director within 28 days of the date on which the agreement is made, or
(ii) if, within 28 days of the provision of the copy, the Director gives notice in writing, to the party providing it, that he does not approve the agreement because it does not satisfy the criterion specified in sub-paragraph (6) below.
(6) The criterion referred to in sub-paragraph (5) above is that the Director considers that—
(a) in relation to an agreement made on or before the appointed day, the agreement is necessary to secure the effective operation on that day of any network code; or
(b) the agreement is not likely to have any significant effect in restricting, distorting or preventing competition; or
(c) to the extent that the agreement has such an effect, the effect is not greater than is necessary to—
(i) promote effective competition between gas suppliers in the supply of gas which has been conveyed through pipes or between gas shippers in arranging with a public gas transporter for gas to be introduced into, conveyed by means of, or taken out of a pipeline system operated by that public gas transporter by providing for access to and use of the pipeline or storage system, or
(ii) protect consumers in particular in relation to the safety and security of gas supply, or
(iii) promote economy or efficiency on the part of persons undertaking activities licensed under section 7, 7A(1) or 7A(2) of the Gas Act 1986.