If you're talking about property, the treasury has made constraints over this.
The Duchies of Lancaster and Cornwall (Accounts) Act 1838 gave the Treasury a role to ensure that actions taken by any Duke when managing the Duchy cannot compromise the long-term value of the estate. For this reason the Treasury must, for example, approve all property transactions with a value of £500,000 or more. The Duchy’s annual accounts are laid before the House of Commons and the House of Lords so that Parliament can be satisfied that the Treasury is fulfilling its statutory responsibilities.
Has consideration been given as to whether the tax position of the estate impacts upon the wider marketplace?
The Duchy estate and the Treasury and have considered this and do not believe that the Duchy’s tax status impacts on the marketplace. The Duchy of Cornwall is a private estate which has Crown exemption. The Duke of Cornwall (The Prince of Wales) pays tax as agreed in the published Memorandum of Understanding. He does not pay capital gains tax since he does not receive the Duchy’s capital gains. The Duke does pay income tax on his income from the Duchy of Cornwall. The Treasury and Duchy do not believe that in practice these arrangements have a material effect on the property market.
At the Treasury's request, the Duchy of Cornwall has tested this proposition. It has reviewed its 12 large property transactions over the past three years. The prices at which they took place all reflected the then current open market prices. Deals were normally negotiated through independent agents and disposals for development often included overage to reflect future price movements.
The Duchy esate is neither corporation or a property trader, and the vast majority of its property holdings are held fir thing term as core holdings. All of the capital proceeds realised from the Duchy's property sales must be reinvested within the business, and are not distributable.