used to amend procurement laws, notably with the Federal Acquisition Reform Act (FARA) and the Federal Acquisitions Streamlining Act (FASA). Other relevant laws include the Federal Property and Administrative Services Act of 1949, the Armed Services Procurement Act (ASPA) and the Antideficiency Act. Antideficiency Act U.S. Federal fiscal law is about Congressional oversight of the Executive Branch, not principally toward getting the mission accomplished nor getting a good deal for the Government. Fiscal law frequently prevents government agencies from signing agreements that commercial entities would sign. Therefore, fiscal law can constrain a federal agency from the quickest, easiest, or cheapest way to accomplish its mission. This constitutionally mandated oversight of the use of public funds is associated with the principle of checks and balances. A good working relationship and robust communication between the Executive and Legislative branches is the key to avoiding problems in this area. The power within fiscal law comes from the Antideficiency Act (ADA), which provides that no one can obligate the Government to make payments for which money has not already been appropriated. The ADA also prohibits the Government from receiving gratuitous services without explicit statutory authority. In particular, an ADA violation occurs when a Federal agency uses appropriated funds for a different purpose than is specified in the appropriations act which provided the funds to the agency. The ADA is directly connected to several other fiscal laws, namely the Purpose Act and the Bona Fide Needs Rule. Money appropriated for one purpose cannot be used for a different purpose, according to the Purpose Act (). The annual DoD appropriations acts include approximately 100 different appropriations (known as "colors of money"), and by this rule operations and maintenance (O&M) funds may not be used to buy weapons. Even an expenditure within the apparent scope of one appropriation may not be permissible if there is a more specific appropriation or the agency has made a previous funds election contrary to the proposed use of funds. For example, O&M fund can be used for purchasing repair parts, but if the parts are required to effect a major service life extension that is no longer repair but replacement – procurement funds must be used if the total cost is more than $250,000 (otherwise known as the Other Procurement threshold, for example, Other Procurement Army (OPA) threshold) or another procurement appropriation is available such as the armored vehicle or weapons