(1) Where paragraph (3) applies, the Treasury may authorise one or more of the following measures -

(a) changing the distribution of allowances to be auctioned at auctions within a calendar year;

(b) increasing the volume of allowances to be auctioned in a calendar year -

(i) by bringing forward part of the volume of allowances to be auctioned in a subsequent calendar year;

(ii) by the release for auction of up to 25% of the allowances held in the new entrants’ reserve provided for in article 34G of the Trading Scheme Order;

(iii) by the release for auction of allowances from the market stability mechanism account held by the UK ETS authority.

(iv) [deleted];

(v) by the release for auction of allowances from the flexible reserve provided for in article 23A of the Trading Scheme Order.