Final answer:
The mentioned sections, 31 USC 1341, 1342, and 1517, are provisions of the Antideficiency Act, which prohibit federal agencies from overspending or entering into obligations before appropriations are made, accepting voluntary services without authorization, and over-obligating funds beyond available appropriations.
Step-by-step explanation:
31 USC 1341 relates to the limitation on expending and obligating amounts by federal agencies, often referred to as the Antideficiency Act. This section prohibits federal agencies from involving the government in a contract or obligation for the payment of money before an appropriation has been made, unless authorized by law.
31 USC 1342 is a prohibition on the acceptance of voluntary services for the government, except in cases of emergency involving the safety of human life or the protection of property, or as otherwise authorized by law. This is also part of the Antideficiency Act, to prevent the government from accepting unpaid voluntary services that could pressure Congress to fund these services afterward.
31 USC 1517 covers the prohibition against federal agencies making or authorizing an expenditure or obligation exceeding an amount available in an appropriation or fund for the expenditure or obligation, or involving the government in a contract or obligation for the payment of money before an appropriation is made, unless authorized by law. This part of the Antideficiency Act also includes the requirement that an agency's financial and administrative controls are adequate to avoid and prevent the over-obligation or over-expending of available appropriations.