[15] The effect of a valid expert determination clause, however, is not to oust the jurisdiction of the court, but to limit, in some circumstances, the matters which the court can consider. Prior to the conclusion of the expert determination procedure - that is, prior to the making of a determination - any party to a contract containing such a clause remains free to sue upon the contract, unless the contract itself makes compliance with some form of dispute resolution procedure a condition precedent to the enforcement of rights under the contract. In relation to the latter type of contract, the effect of the clause is not to invalidate an action brought in breach of it, but to provide a defence and to "postpone" but "not annihilate the right of access to the court" (Freshwater v Western Australian Assurance Co Ltd [1933] 1 KB 515 at 523 per Lord Hanworth MR). The latter type of clause is not in issue here, however. Where a contract contains a dispute resolution clause, and a party who has not first proceeded in accordance with that clause sues on the contract, the court has, however, a jurisdiction to stay the proceeding so as, in a practical sense, to force the party to fall back upon the contractual procedure. The circumstances in which a stay will be granted are considered in Jacobs, Commercial Arbitration: Law and Procedure (2001), at [12.49/5] - [12.49/8]. There are no proceedings on the agreement in the present case, and it is therefore not necessary to consider those principles." (emphasis added)