xmlns:atom="http://www.w3.org/2005/Atom" xmlns:atom="http://www.w3.org/2005/Atom"
the timekeeping shall have an accuracy of 0,02 %;
the correction possibility of the clock shall be not more than 2 minutes per week. Correction for summer and wintertime shall be performed automatically;
correction, automatic or manually, during a trip shall be prevented.