What are the differences between GSA Multiple Award Schedule (MAS) contracts, Governmentwide acquisition contracts (GWACs), and Multi-agency contracts (MACs)?

GSA Multiple Award Schedule (MAS) contracts are indefinite delivery, indefinite quantity (IDIQ) contracts available to all federal agencies worldwide. GSA awards and administers MAS contracts pursuant to section 201 of the Federal Property and Administrative Services Act of 1949, as amended. Under the MAS Program, GSA enters into governmentwide contracts with commercial firms to provide over 4 million commercial services and products. Agencies place orders directly with MAS contractors. Interagency agreements are not required to use MAS contracts. The Economy Act does not apply to orders placed against MAS contracts. Governmentwide Acquisition Contracts (GWACS) are task order or delivery order contracts for information technology established by one agency for governmentwide use. Each GWAC is operated by an executive agent designated by the Office of Management and Budget pursuant to section 5112(e) of the Clinger-Cohen Act. The Economy Act does not apply to orders under GWACs. Multi-agency contracts (MACs) are task order or delivery order contracts established by one agency for use by government agencies to obtain a variety of supplies and services. The Economy Act (Federal Acquisition Regulation (FAR) Subpart 17.5) applies to orders placed under MACs, with the exception of MACs for information technology that are established pursuant to the Clinger-Cohen Act.