Paragraph 10 I1

If any permanent or temporary alterations or additions to a protected asset are reasonably necessary in consequence of the construction or operation of a specified work, in order to ensure the safety of the protected asset or the continued safe operation of the protected asset, such alterations and additions may be carried out by the protected asset owner and the undertaker must pay to the protected asset owner the cost of those alterations or additions including, in respect of any such alterations and additions as are to be permanent, a capitalised sum representing the increase of the costs which may be expected to be reasonably incurred by the protected asset owner in maintaining, working and, when necessary, renewing any such alterations or additions.

The protected asset owner, in respect of the capitalised sums referred to in this paragraph, must provide such details of the formula by which those sums have been calculated as the undertaker may reasonably require.

If the cost of maintaining, working or renewing a protected asset is reduced in consequence of any such alterations or additions a capitalised sum representing such saving is to be set off against any sum payable by the undertaker to the protected asset owner under this paragraph.