A system vendor shall not attach unfair and/or unjustified conditions to a contract with a subscriber, such as preventing a subscriber from subscribing to or using any other system or systems, requiring the acceptance of supplementary conditions which have no connection with subscription in its CRS, or imposing an obligation to accept an offer of technical equipment or software.

Where a subscriber is an autonomous enterprise that employs fewer than 50 persons and whose annual turnover and/or annual balance sheet total does not exceed F1£8,700,000, it may terminate its contract with a system vendor by giving notice, which need not exceed three months, to expire not before the end of the first year of that contract. In such a case, a system vendor shall not be entitled to recover more than the costs directly related to the termination of the contract.