If the CMA considers that it is under a duty to make a merger reference under section 32, it may instead of making such a reference accept undertakings to take such action as it thinks appropriate from such of the parties concerned in the actual or prospective merger as it considers appropriate.

The power under subsection (1) is to be exercised for the purpose of remedying, mitigating or preventing the prejudicial effect on the Authority's ability, in carrying out its functions by virtue of this Act, to make comparisons between water enterprises that the actual or prospective merger has had, may have had or may be likely to have.

In proceeding under subsection (1), the CMA must, in particular, have regard to the need to achieve as comprehensive a solution as is reasonable and practicable to the prejudicial effect on the Authority's ability, in carrying out its functions by virtue of this Act, to make comparisons between water enterprises.

In proceeding under subsection (1), the CMA may, in particular, have regard to the effect of any action on any relevant customer benefits in relation to the actual or prospective merger.

Where the CMA makes a request under subsection (6), the Authority must give its opinion on the effect of the undertakings offered.

An undertaking under this section ceases to be in force if an order under section 75 or 76 of the Enterprise Act 2002 (powers to make an order where an undertaking is not fulfilled) is made, in a case where that provision of the Enterprise Act 2002 as applied by paragraph 1 of Schedule 4ZA may have effect in relation to such an undertaking.

The CMA must consider any representations received by it in relation to varying or releasing an undertaking under this section as soon as reasonably practicable.

In this section “relevant customer benefit” has the meaning given by paragraph 7 of Schedule 4ZA, except that references in paragraph 7 to what the CMA believes are to be read for the purposes of subsection (7) as references to what the Authority believes.