Congress enacts a statute, the Federal Deposit Insurance Corporation (an administrative agency) issues rules, the Southeast Financial Institutions Association (a private organization) issues instructions, South Valley Bank posts a memo with orders for its employees, and Tina tells her co-worker about a recent news story. Sources of law include

c. the rules issued by federal administrative agencies.

Explanation:

Every financial institutions in united states are overseen by the federal administrative agencies to ensure both consumer's safety and prevent unfair competition among them.

In a free market, Private organizations such as (Southeast Financial Institutions Association) tends to have the freedom to adopt a plan or create a financial product which they feel will give the most amount of profit. But every decisions that they made need to follow the guidelines provided by the federal administrative agencies.

These guidelines could change from time to time, depending on the government that elected by the voters. They will show this guidelines on official websites, so some members of the private organizations need to constantly check for new rules to prevent investigation from the federal administrative agencies.