A model opposition to a petition for review by the Equal Employment Opportunity Commission (EEOC) of a final Merit Systems Protection Board (MSPB) decision in a mixed case appeal. This Standard Document opposes the EEOC's review of a final MSPB decision on a federal employee's appeal of a personnel action that the employee claims was based wholly or in part on discrimination based on race, color, religion, sex, national origin, disability, age, or genetic information. It is based on federal law and EEOC and MSPB regulations. This Standard Document has integrated notes with important explanations and drafting tips.