14 CFR §27.1143

1. (a)There must be a separate power control for each engine.
2. (b)Power controls must be grouped and arranged to allow—
   1. (1)Separate control of each engine; and
   2. (2)Simultaneous control of all engines.
3. (c)Each power control must provide a positive and immediately responsive means of controlling its engine.
4. (d)If a power control incorporates a fuel shutoff feature, the control must have a means to prevent the inadvertent movement of the control into the shutoff position. The means must—
   1. (1)Have a positive lock or stop at the idle position; and
   2. (2)Require a separate and distinct operation to place the control in the shutoff position.
5. (e)For rotorcraft to be certificated for a 30-second OEI power rating, a means must be provided to automatically activate and control the 30-second OEI power and prevent any engine from exceeding the installed engine limits associated with the 30-second OEI power rating approved for the rotorcraft.