Generating unit certificates for individual AnS categories are issued by the following independent certification authorities recognised by ČEPS (in alphabetical order):

For ancillary services concerning active power (primary and secondary):

• I&C Energo s.r.o.
• MEACONT Praha spol. s.r.o.
• ORGREZ, a.s.
• OSC, a.s.

For ancillary services concerning secondary voltage and reactive power control:

• EGÚ Praha Engineering, a.s
• MEACONT Praha spol. s.r.o.
• ORGREZ, a.s.

For ancillary services concerning "Island operation":

• I&C Energo s.r.o
• MEACONT Praha spol. s.r.o.
• ORGREZ, a.s.
• OSC, a.s.

For ancillary services concerning “Black start”:

• MEACONT Praha spol. s.r.o.
• ORGREZ, a.s
• OSC, a.s.
 

Authorisation for secondary control concerning active power allows certification to be issued for spinning reserve at hydro power stations, tertiary power control, operating reserve, quick-start reserve available within 10 minutes and load shedding.

• Certification Forms and Measurement Reports are available in the Grid Code, Revision 09 
  (in Czech)