I'm guessing Ohio gaming laws require on-site secondaries for all denoms above $5 in case of a security breach.
(A) Unless otherwise authorized by the executive director, each casino operator shall have a primary set of value chips, a separate secondary set of value chips, a primary set of non-value chips, and a non-value chip reserve, which shall conform to the color and design specifications set forth in this chapter. An approved secondary set of value chips and reserve non-value chips shall be placed into active play when the primary set of value chips or non-value chips is removed.
(B) The secondary set of value chips shall have different secondary colors than the primary set for all denominations of twenty-five dollars and higher.
http://codes.ohio.gov/oac/3772-11-13v1