Regulation
Currently, commercial banks are regulated in most jurisdictions by government entities and require a special bank license to operate.
Usually, the definition of the business of banking for the purposes of regulation is extended to include acceptance of deposits, even if they are not repayable to the customer's order – although money lending, by itself, is generally not included in the definition.
Unlike most other regulated industries, the regulator is typically also a participant in the market, being either publicly or privately governed central bank. Central banks also typically have a monopoly on the business of issuing banknotes. However, in some countries, this is not the case. In the UK, for example, the Prudential Regulation Authority licenses banks, and some commercial banks (such as the Bank of Scotland) issue their own banknotes in addition to those issued by the Bank of England, the UK government's central bank.
Banking law is based on a contractual analysis of the relationship between the bank (defined above) and the customer – defined as any entity for which the bank agrees to conduct an account.
The law implies rights and obligations into this relationship as follows:
The bank account balance is the financial position between the bank and the customer: when the account is in credit, the bank owes the balance to the customer; when the account is overdrawn, the customer owes the balance to the bank.
The bank agrees to pay the customer's checks up to the amount standing to the credit of the customer's account, plus any agreed overdraft limit.
The bank may not pay from the customer's account without a mandate from the customer, e.g. a check drawn by the customer.
The bank agrees to promptly collect the checks deposited to the customer's account as the customer's agent and to credit the proceeds to the customer's account.
And, the bank has a right to combine the customer's accounts since each account is just an aspect of the same credit relationship.
The bank has a lien on checks deposited to the customer's account, to the extent that the customer is indebted to the bank.
The bank must not disclose details of transactions through the customer's account – unless the customer consents, there is a public duty to disclose, the bank's interests require it, or the law demands it.
The bank must not debank a customer without reasonable notice as regulation demands.
These implied contractual terms may be modified by express agreement between the customer and the bank. The statutes and regulations in force within a particular jurisdiction may also modify the above terms or create new rights, obligations, or limitations relevant to the bank-customer relationship.
Some types of financial institutions, such as building societies and credit unions, may be partly or wholly exempt from bank license requirements, and therefore regulated under separate rules.
The requirements for the issue of a bank license vary between jurisdictions but typically include:
Minimum capital
Minimum capital ratio
'Fit and Proper' requirements for the bank's controllers, owners, directors, or senior officers
Approval of the bank's business plan as being sufficiently prudent and plausible.
Bank lobbying can result in regulations beneficial to banks.