The utility may require that the QF provide additional technical information as necessary to determine the impact of the QF on the safety and reliability of the electric system. Such information may include principal components of the facility (electric generators, transformers, and switchyard equipment), fuel type, maximum gross and net output, expected installation and operation. A purchasing utility may also ask a QF that has not filed a Form No. 556 to provide the utility an attestation that the QF meets the requirements for QF status.