Other improvements in check collection have focused on when a customer has access to funds deposited in a bank. Until the late 1980s, depository institutions were not required to make funds from check deposits avail- able for withdrawal within specif ic time frames. In 1988, the Federal Reserve Board adopted Regulation CC, Availability of Funds and Collec- tion of Checks, which implemented the Expedited Funds Availability Act. Regulation CC established maximum permissible hold periods for checks and other deposits, after which banks must make funds available for with- drawal. It also established rules to speed the return of unpaid checks