The court was guided by the fact that the preferential old-age pension, assigned under Law No. 1788-XII, is not a separate type of pension provision, but only provides preferential conditions (reduction of retirement age) for the assignment of old-age pension. Since such a pension is assigned and paid in accordance with the procedure and conditions of Law No. 1058-IV, persons receiving it do not have the right to re-assign the same type of pension (old-age pension) on general grounds after reaching retirement age.