The date is in the Common Era (minus sign in years is not permitted) and time zone although not included UTC is implied The date is in the Common Era (minus sign in years is not permitted) The format of Journey Time or of Maximum Journey Time is expressed in hours or in days, with the format Pdd, where: - "P" is a letter in ("H" = Hours or "D" = Day) - "dd" is a two digits number If P is "H" then the number is less or equal to 24 If P is "D" then the number is less or equal to 45 The maximum 45 days period for the journey time is derived from the maximum limit of the TIM_EAD timer defined in Appendix H. The time zone although not included UTC is implied The format of Time To ... or Maximum Duration of ... is expressed in days, months or years, with the format P999, where: - "P" is a letter in ("D" = Day, "M" = Month or "Y" = Year) - "999" is a three digits number