A421-2018

AIA Document A421™–2018 is a Master Agreement between the Contractor and Subcontractor. It is intended for use when the Subcontractor’s scope of Work will subsequently be specified through one or more Work Orders. A421-2018 provides only the common terms and conditions that will apply to each Work Order. Use of A421 plus a Work Order creates a contract that includes both the terms and the scope of Work. A421-2018 is coordinated for use with AIA Document A422™–2018, Work Order for use with Master Agreement Between Contractor and Subcontractor. The Master Agreement plus Work Order contracting method allows multiple scopes of Work to be issued quickly without renegotiating the terms and conditions of the Contract.