(18)The standard baseline of 25 % of deliverable supply and of open interest has been set with reference to the experience of other markets and other jurisdictions. The baseline should be adjusted by competent authorities to enable it to be reduced to 5 % of deliverable supply and open interest, or 2,5 % in the case of some agricultural commodity derivatives, and to be increased up to 35 % of deliverable supply and open interest should the characteristics of the market require it in order to support the orderly settlement and functioning of the contract and its underlying market. Since any adjustment to the baseline figure applies only where, and for so long as, objective characteristics of the market require it, temporary adjustments to the baseline should be therefore possible. Competent authorities should ensure that an adjustment downwards of the baseline is effected whenever it is necessary to prevent dominant positions and to support orderly pricing in the commodity derivative and in the underlying commodity. For derivatives without a tangible underlying the deliverable supply cannot be used to establish a position limit. Therefore, competent authorities should be able to enhance or adjust the methodologies to determine position limits for these commodity derivatives based on different parameters like the use of open interest also for the spot month.