Process 4. 2.1 To enable National Grid NTS to undertake determinations of daily CVs, each DNO shall: (a) provide to National Grid NTS a full description of the basis on which daily CVs in respect of its LDZ are (from time to time, and in any applicable circumstances, including without limitation pursuant to paragraphs (5)(b) or (c), (6) or (7) of regulation 4A, where applicable) to be determined and the arrangements made by the DNO for such determination; and (b) provide or cause to be provided to National Grid NTS each Day the information necessary for the determination (on the applicable basis specified by the DNO under paragraph The notice(s) stated in this clause would imply this is written communication i.e. email or letter. Cost Recovery applies to F3.2.2 and F4.3.3 only both are to be confirmed upfront with quotation agreed ahead of changes being implemented. (a)) of daily CVs, including average calorific value and volume (for the Day) for each input point and output point, and notice of any failure of apparatus as referred to in paragraph 4A(7) of the Regulations.