2019-08-15 Calendar operator practices — Guidelines to protect against calendar abuse CC/R 18003:2019 csd/cc-18003.xml csd/cc-18003.html csd/cc-18003.pdf csd/cc-18003.doc csd/cc-18003.rxl en 2019 CalConnect CalConnect CalConnect 2019-01-18 1 en published CALSPAM