13.2(b)(i)(2) Crewmembers hired after ratification of this agreement who are awarded a Home Base Airport designation and subsequently decide to move within ninety (90) miles of a Domicile will be assigned to that Domicile. Upon written request, the Company shall reimburse the crewmember for moving expenses as set forth in Section 15 of this agreement. If a crewmember elects to be reimbursed for moving expenses, the crewmember shall relinquish all rights to use a Home Base Airport, regardless of where he might subsequently move in the future.
I believe this means that you have to have the seniority to be awarded a home base, so looks like you have to live or at least commute to one of the 5 domiciles on your own dime until senior enough to hold a home base. Keep in mind lots of current pilots report to those domiciles and are not counted against the home base percentile. Approximately 300 pilots live in CMH for example. maybe someone with too much time on their hands can look into the seniority lists and total current domicile numbers.
