What should be the frequency of training the PIO and Appellate Authority?

As per OM No.411012011-IR Dated: 18th May 2011, the DoPT has instructed that each Ministry/ Department should organize atleast a half day training programme for all CPIOs/ Appellate Authorities (AAs) every year to sensitize them about their role in implementation of the RTI Act. The concerned Ministries/ Departments shall ensure that similar programmes are organized for all CPIOs/ AAs of all attached/ subordinate offices and PSUs under their control as well.

Since all officers can act as a deemed PIO, the training should preferably be extended to all.