15-09-2025 REF: 23-0001 OIR 2025-09-10 > 2025-10-08 - ROB - Science Manager - BOPRC Dear Carol, Thank you for your acknowledgement of my OIA (Ref: 23-0001), and I include the history to-date below for reference. For clarity, I now add the following specific questions: In Tauranga City Council, who authorised the substitution of fluoride with fluorosilicic acid in the public water supply? Please provide the name(s), position(s), and date(s) of the authorisation. What legal or statutory authority permits this substitution, and under which document(s) was it made? Please provide any documents or studies that validate fluorosilicic acid as an acceptable equivalent to fluoride for the purposes of compliance with national fluoridation policy. Finally, I request that any potential charges be communicated in advance of engagement, and justified against the LGOIMA criteria of “reasonable to do so.” This information is a matter of public record a...