In fiscal year 2019, the US Federal Government spent $597bn on contracts. The market for state, local, and education (SLED) contracts is thought to be worth $1.5 trillion. Contracts for federal government procurement usually involve appropriated funds spent on supplies, services, and interests in real property by and for the use of the Federal Government through purchase or lease, whether the supplies, services, or interests are already in existence or must be created, developed, demonstrated, and evaluated. Federal Government contracting has the same legal elements as contracting between private parties: a lawful purpose, competent contracting parties, an offer, an acceptance that complies with the terms of the offer, mutuality of obligation, and consideration. However, federal procurement is much more heavily regulated, subject to volumes of statutes dealing with Federal contracts and the Federal contracting process, mostly in Titles 10, 31, 40, and 41 of the United States Code.