The Operational Authorisation – which has replaced the term PfCO – is based upon a risk assessment that is completed by the UAS operator, or through a series of Pre-Defined Risk Assessments (PDRA). This means that individuals or organisations that wish to operate a drone within the Specific Category must either provide a risk assessment to the CAA (by following the OSC – Operating Safety Case – process), or adhere to the requirements of the PDRA. Please note, a £290 fee to the CAA applies when applying for a UKPDRA-01 Operational Authorisation. An annual renewal of £217 also applies.