2/The validity of the verification of 4 years or a longer period expires on the last day of the closing year
3/The validity of verification of less than 4 years expires on the day that corresponds to its beginning date by its number,
4/ Regardless of whether the measuring device was used, the verification of the measuring device loses its validity, if
a) the period defined in the verification has expired
b) the attesting sign of the authority has been removed, got damaged , or the certificate has been modified,
c) the verification certificate or any attesting sign of the authority has been called off.
d) the measuring device has been repaired or changed in a way that could affect its metrological parameters,
e) the measuring device to a place has been relocated.