Answered: NEC3 ECC: Who pays for preparing "Proposed Instructions"

The answer is that the Contractor bears the costs as per clause A11.2(22).

However, read the words literally : are just preparing a quotation ?

Or are you doing additional work outside of the Works Information in order to prepare the subsequent quotation ? In which case, the former is a change to the Works Information and a compensation event in itself for which you can charge.