Changing Tack

A contract may require a party giving notice of a claim to specify the contractual or legal basis of that claim in the notice (or the supporting particulars). What if that party states a contractual or legal basis for the claim but later (perhaps with the benefit of additional information or because of advice from its lawyers) changes its mind or wants to include further contractual or legal bases? This was considered by the Hong Kong Court of Appeal in Maeda Corporation and China State Construction Engineering (Hong Kong) Limited v Bauer Hong Kong Limited [2020] HKCA 830. It found that a subcontractor could not change the contractual basis for its claim once the time period for providing such notice had expired. What, if any, impact will this decision have on the FIDIC forms of contract?