156Effect of undertakings under section 154
(1)No market investigation reference shall be made by the OFT or the appropriate Minister in relation to any feature, or combination of features, of a market in the United Kingdom for goods or services if—
(a)the OFT has accepted an undertaking or group of undertakings under section 154 within the previous 12 months; and
(b)the goods or services to which the undertaking or group of undertakings relates are of the same description as the goods or services to which the feature, or combination of features, relates.
(2)Subsection (1) does not prevent the making of a market investigation reference if—
(a)the OFT considers that any undertaking concerned has been breached and has given notice of that fact to the person responsible for giving the undertaking; or
(b)the person responsible for giving any undertaking concerned supplied, in connection with the matter, information to the OFT which was false or misleading in a material respect.