Validity of Card
Validity of card for appointed user. The validity format is YYYY-MM-DD hh (YYYY is year, MM is month, DD is date). It is only used in expert mode.

displayWhy are there "*" behind property and property is bold type font?
displayWhy is the saved button still forbidden after property changed?
displayWhy property is forbidden or hidden?
displayWhy property value displays multiple value and can not be displayed?