(1) A maximum bid-size, or any other remedial measures necessary to mitigate an actual or potential discernible risk of market abuse, money laundering, terrorist financing or other criminal activity, as well as anti-competitive behaviour, may be imposed by the appointed auction platform after consulting the FCA and the auctioneer.

(2) The maximum bid-size must either be expressed as a percentage of the total number of auctioned allowances in any given auction or a percentage of the total number of auctioned allowances in any given year, whichever may be most appropriate to deal with the risk of market abuse.

(3) For the purposes of this regulation, "maximum bid-size" means the maximum number of allowances that may be bid for, directly or indirectly, by any person, or by any group of persons belonging to any of the following categories -

(a) the same group including any parent undertakings, its subsidiary undertakings and affiliated undertakings;

(b) the same business grouping;