Common standard time period for station battery to handle outage of AC power to chargers 8-12 hours Time to restore data exchange redundancy when redundancy testing by RC/TOP/BA deemed unsuccessful 2 hours Transition period to backup control facility (fully functioning) 2 hours Annual testing of backup control facility must prove to be functional for this long 2 hours Every 2 years TO/TOP/DSP must provide how many hours of system restoration training to field switching personnel 2 hours Every 2 years GOP's with blackstart resources shall provide how many hours of training to operating personnel responsible for startup 2 hours