44. The above implies the need for an adequate formation programme for the pastoral workers. The formation leaders' preparation should prepare them to present the fundamental guidelines of marriage preparation which we have spoken about with clear adherence to the Church's Magisterium, a suitable methodology and pastoral sensitivity, and also enable them to offer their specific contribution, according to their own expertise, to the immediate preparation (nos. 50-59). The pastoral workers ought to receive their formation in special Pastoral Institutes and be carefully chosen by the Bishop.