In less than a month, high rollers will no longer need wads of cash to gamble at casinos in Missouri.

The Missouri Gaming Commission voted Wednesday to approve rules to implement a new state law that will allow casino customers to gamble on credit. Legislators passed the law this year. The law, enacted without Gov. Jay Nixon’s signature, will take effect Aug. 28.

Missouri will be the 11th state to allow gamblers to establish a casino line of credit, known in the industry as a “marker.” Gaming commission officials prefer the term “counter checks.”

Whatever the nomenclature, the new Missouri law — modeled on those in other states — will allow gamblers to qualify for lines of credit of at least $10,000. There is no limit on the maximum amount.

Casinos will conduct credit checks — similar to those done by credit card companies for new cardholders — on gamblers who seek the no-interest credit line. The new Missouri law requires the amounts to be repaid within 30 days.