A flexible pouch and valve assembly is provided for aseptically storing a substance, dispensing multiple portions of the stored substance therefrom, and maintaining substance remaining in the pouch in an aseptic condition sealed with respect to ambient atmosphere. The ends of the tubular lead body are sealed and a space is defined between the inner surface of the tubular lead component and the outer surface of the lead body. At least two of the capacitors are connected to the input of a comparator, so that the influence of a constantly modifiable operational voltage and the influence of a discharge of modifiable voltage levels by the piezo element or surge generator does not affect the time function. The vacuum interrupter has at least one movable contact for contacting at least one stationary contact. The payment request andor other action is then only executed when the certificate-identifying information, the user-identifying information and the authority information within the received certificate are successfully validated.