In section 31 of ITTOIA 2005 (trade profits: relationship between rules prohibiting and allowing deductions)—
In section 274 of ITTOIA 2005 (property businesses: relationship between rules prohibiting and allowing deductions)—
In section 51 of CTA 2009 (trade profits: relationship between rules prohibiting and allowing deductions)—
In section 214 of CTA 2009 (property businesses: relationship between rules prohibiting and allowing deductions)—
The amendments made by this section have effect in relation to deductions in respect of amounts which arise directly or indirectly in consequence of, or otherwise in connection with—
But those amendments do not have effect where the arrangements are, or any such transaction is, entered into pursuant to an unconditional obligation in a contract made before that date.
"An unconditional obligation" means an obligation which may not be varied or extinguished by the exercise of a right (whether under the contract or otherwise).