todo task for gci to elaborate fields

Todo Task for GCI task : https://www.google-melange.com/gci/task/view/google/gci2014/5038048144261120
Also added a field , "Identity proof", suppose if some found any id / driving license/or any visitor card , he can also give details and that will help to find out the dead person's family
Is there any reason why the length of this is '64' and the others 120 ?. Keep all of them 120 ? or 300 ?(since it's text)