For software application stores, online search engines and online social networking services listed in the designation decision, gatekeepers should publish and apply general conditions of access that should be fair, reasonable and non-discriminatory. Those general conditions should provide for a Union based alternative dispute settlement mechanism that is easily accessible, impartial, independent and free of charge for the business user, without prejudice to the business user’s own cost and proportionate measures aimed at preventing the abuse of the dispute settlement mechanism by business users. The dispute settlement mechanism should be without prejudice to the right of business users to seek redress before judicial authorities in accordance with Union and national law. In particular, gatekeepers which provide access to software application stores are an important gateway for business users that seek to reach end users. In view of the imbalance in bargaining power between those gatekeepers and business users of their software application stores, those gatekeepers should not be allowed to impose general conditions, including pricing conditions, that would be unfair or lead to unjustified differentiation.