Section 19 is repealed and the following section substituted:
“19 Retirement of Kyoto units by the Crown
“(1) The Crown may offset each tonne of carbon dioxide equivalent of human-induced greenhouse gas emissions, emitted from sources listed in Annex A of the Protocol, by transferring a Kyoto unit to the retirement account.
“(2) New Zealand units and approved overseas units may not be retired unless converted to assigned amount units.”