Jim has been arrested for drunk driving. In order to be allowed out of jail before his court date, Jim will most likely need:

Answer: A bail bond

Jim will most likely need to post bail to be allowed out of jail before his court date. 

Bail is a set amount of money an arrested individual must pay the court to guarantee they will appear for their scheduled hearings and trial dates. By posting bail, Jim can secure his release from jail pending his court appearances.

There are several options for posting bail:

1. Cash Bail: Jim or someone on his behalf can pay the total bail amount in cash directly to the court. Once the case is resolved, the bail money is returned minus any fees or fines imposed by the court.
2. Bail Bond: If Jim or his family cannot afford to pay the full bail amount, they may use a bail bond service. A bail bondsman typically charges a non-refundable fee, usually a percentage of the total bail amount, in exchange for posting the full bail amount on Jim's behalf. The bondsman assumes responsibility for ensuring that Jim appears in court, and if he fails to do so, the bondsman may be liable for paying the full bail amount to the court.
3. Property Bond: In some cases, Jim may be able to use property, such as real estate, as collateral to secure his release. A property bond requires that the property's value be equal to or greater than the bail amount set by the court.
4. Release on Own Recognizance (ROR): In certain situations, the court may release Jim on his recognizance, meaning that he is not required to post bail but must promise to appear in court as scheduled. ROR is typically granted to individuals with strong ties to the community, minimal flight risk, and no prior criminal record.

The specific requirements and options for posting bail vary depending on the jurisdiction and the severity of the charges against Jim. 

Jim needs to consult with an attorney to understand his legal rights and explore the most appropriate course of action for securing his release from jail.