What must I do to enroll in the Plan? Before you can join the Plan, you must complete an application to participate in the Plan.To file appeals of denied claims or grievances, or to file lawsuits under ERISA. ERISA is a federal law that sets minimum standards for retirement plans in private industry. The nationally-recognized Achieving a College Education (ACE) program serves over 100 local high schools and helps high school students earn a college degree. The stipulation stated, "Defendant Maricopa County is not a necessary party at this juncture for obtaining the complete relief sought. Find out how to submit a public records request to the MCAO Custodian of Records.