There must be a preamble to the bill of quantities in which is stated, among other things, the following:
the method of measurement used in preparing the bills of quantities;
if the CESMM is used, the edition which applies and which parts of
sections 17 (which cover general instructions, etc.) are to apply;
the classes or types of work which are not measured in accordance with the CESMM;
provisions with respect to method-related items;
provisions with respect to any adjustment item to the total of billed prices;
payments to be made in respect of prime cost items;
the definition of rock;
if CESMM is used, identification of bodies of water on or bounding the site;
if no price is entered against an item that it will be assumed that no payment is to be made under that item.
The provisions with respect to the method-related items inserted by the tenderer may need further amplification added before the contract is awarded, to clarify such matters as the method of payment of such items.