The provisions of this Section may be departed from only by an agreement:

1. which is entered into after the dispute has arisen; or

2. which allows the consumer to bring proceedings in courts other than those indicated in this Section; or

3. which is entered into by the consumer and the other party to the contract, both of whom are at the time of conclusion of the contract domiciled or habitually resident in the same State bound by this Convention, and which confers jurisdiction on the courts of that State, provided that such an agreement is not contrary to the law of that State.