Answer:
The lack of appropriation may be because Congress intentionally wanted to prevent something from happening, or may be because Congress failed to fund it for other reasons. For example, Members of Congress may be interested in limiting or denying funding to federal agencies that are required by law to promulgate regulations, implement or enforce rules, initiate or operate programs, or take other specified actions.
Explanation:
To provide funding for discretionary spending programs of the government, Congress generally uses an annual appropriations process. Under congressional rules, when making decisions about the funding of individual items or programs, however, Congress may be constrained by the terms of previously enacted legislation.
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