18 CFR §292.307

1. (a)Qualifying facility obligation to provide power during system emergencies. A qualifying facility shall be required to provide energy or capacity to an electric utility during a system emergency only to the extent:
   1. (1)Provided by agreement between such qualifying facility and electric utility; or
   2. (2)Ordered under section 202(c) of the Federal Power Act.
2. (b)Discontinuance of purchases and sales during system emergencies. During any system emergency, an electric utility may discontinue:
   1. (1)Purchases from a qualifying facility if such purchases would contribute to such emergency; and
   2. (2)Sales to a qualifying facility, provided that such discontinuance is on a nondiscriminatory basis.