Region 5 Associations are: Kentucky, Lake Erie (Upper counties of Ohio), Michigan, Ohio and West Virginia. Links to each are on the site navigation bar.
You should contact the membership chair of your respective Association for information regarding the specific requirements of your Association.
You must be a USATF member, have passed a background (USATF only) check and list at least one other volunteer who has done the same on the club application to be considered a club.
Here is a link to the club page for USATF: USATF Club Information page
There is a tutorial on how to become a club on the page.