Overview
The Expedited Funds Availability Act (EFA or EFAA) was enacted in 1987 by the United States Congress for the purpose of standardizing hold periods on deposits made to commercial banks and to regulate institutions' use of deposit holds. It is also referred to as Regulation CC or Reg CC, after the Federal Reserve regulation that implements the act. The law is codified in Title 12, Chapter 41 of the US Code and Title 12, Part 229 of the Code of Federal Regulations.
Disclosure
Financial institutions must disclose their hold policies to all account holders, and make the policy available in written form upon request by any customer. It must also be provided at the time of opening of all new accounts.
Additional disclosures are required on deposit slips, at automated teller machines, and when the policy is changed in any way.
Types of hold
Regulation CC stipulates four types of holds that a bank may place on a check deposit at its discretion. Each has its own qualifications and it is legal for the bank to place any type where the requirements are met, although bank policy may instruct that the type of hold placed be the one that holds the most funds the longest that can be applied legally.
From Wikipedia (CC BY-SA 4.0).