OT21450 | Field allowance: changes to the legislation may be made by regulation
From HM Revenue & Customs · Oil Taxation Manual
[Field Allowance was superseded by Investment Allowance which was introduced by Fiance Act 2015 and applies to expenditure incurred on or after 1 April 2015. See OT21550 for guidance on Investment Allowance.]
From the introduction of the field allowance on 22 April 2009 until 16 July 2012 HMRC could effect changes to the field allowance regime by way of order concerning
the definition of a qualifying oil field
the amount of the total field allowance available for any type of new oil field.
From 17 July 2012 HMRC may by order make provision about
the oil fields that are additionally-developed oil fields or qualifying oil fields
the amount of the total field allowance for any description of eligible oil field
the meaning of any term in the field allowance legislation.
The provision that may be made by such an order under CTA2010\S349 is of broad scope.