The Petroleum (Current Model Clauses) Order 1999

Measurement of petroleum obtained from the licensed area

(1) The Licensee shall measure or weigh by a method or methods customarily used in good oilfield practice and from time to time approved by the Minister, all crude oil and natural gas won and saved, other than natural gas used for the purpose of carrying on drilling and production operations and pumping to field storage and refineries, and all casinghead petroleum spirit recovered from the licensed area.

(2) If any measuring or weighing appliance shall at any time be found to be false or unjust the same shall, if the Minister so determines after considering any representations in writing made by the Licensee, be deemed to have existed in that condition during the period of three months prior to the discovery thereof or the period elapsed since the last occasion upon which the same was examined or tested whichever shall be the less and accordingly the royalties payable in respect of such period shall be adjusted.

(3) The Licensee shall not make any alteration in the method or methods of measurement or weighing used by him or any appliances used for that purpose without first informing the Minister and the Minister may in any case require that no alteration shall be made save in the presence of a person authorised by him.