When an accused person is detained in jail, coordination between the police and jail personnel may be required. There is generally an exchange of information between these personnel, particularly where there is a need to keep accomplices separated. When a lengthy investigation is involved, police and jail personnel may cooperate in scheduling interviews and lineups. Since the jail is responsible for detaining some accused persons until their adjudication, jail personnel must be knowledgeable in judicial procedures requiring the presence of the accused and must adhere to court orders bearing upon jail operations. Two Federal fact-finding commissions have presented arguments against the police operating jails. Both commissions indicate major distinctions between police enforcement activity and jail correctional activity that requires a rehabilitative and detention capability. The regional sharing of jail facilities, equipment, and personnel appears to be the best format for jail services. This ensures that adequate resources are available to provide high quality jail services. Custody operations of jails require effective security arrangements and discipline procedures, and a rehabilitation capability should enable the jail to provide services that contribute to returning the inmate to the community as a productive citizen. Jail management involves planning for new construction or the renovation of an existing jail; search, admissions, property inventory, and other steps in prisoner intake procedure; prisoner discipline, visitation privileges, head count, control of medications, prohibition of weapons, and other security measures; prisoner release procedures; and personnel selection and training, jail records, and other staffing operations. Seventeen footnotes are listed.