The amount of the membership fee for a full year is € 20, however the first fee depends on the quarter of the year in which you sign up. € 20 if registration occurs during the first quarter of the year (January-February-March). € 15 if registration occurs during the second quarter of the year (April-May-June). € 10 if the registration takes place during the third quarter of the year, (July-August-September). In these three cases, the fee paid covers until December 31 of this year. If the registration occurred during the last quarter of the year (October-November-December), the amount would be € 25 and would cover until December 31 of next year. The corresponding amount will be paid by bank transfer or PayPal. Instructions for making the payment will be sent to the email address provided in the registration process.