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A quick reference of the DIAR Parts
Current to: (84 FR 69344, Dec. 18, 2019)
| Part Number | Title | ||
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| Part 1400 | Part 1400 [Reserved] |
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| Part 1401 | Part 1401 – Department of the Interior Acquisition Regulation System |
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| Part 1402 | Part 1402 – Definitions of Words and Terms |
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| Part 1403 | Part 1403 – Improper Business Practices and Personal Conflicts of Interest |
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| Part 1404 | Part 1404 – Administrative Matters |
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| Part 1405 | Part 1405 – Publicizing Contract Actions |
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| Part 1406 | Part 1406 – Competition Requirements |
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| Part 1407 | Part 1407 – Acquisition Planning |
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| Part 1408 | Part 1408 – Required Sources of Supplies and Services |
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| Part 1409 | Part 1409 – Contractor Qualifications |
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| Part PARTS 1410–1412 [RESERVED] | Part 1410 – 1412 [Reserved] |
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| Part 1413 | Part 1413 – Simplified Acquisition Procedures |
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| Part 1414 | Part 1414 – Sealed Bidding |
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| Part 1415 | Part 1415 – Contracting by Negotiation |
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| Part 1416 | Part 1416 – Types of Contracts |
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| Part 1417 | Part 1417 – Special Contracting Methods |
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| Part 1418 | Part 1418 [Reserved] |
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| Part 1419 | Part 1419 – Small Business Programs |
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| Part PARTS 1420–1421 [RESERVED] | Part 1420 – 1421 [Reserved] |
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| Part 1422 | Part 1422 – Application of Labor Laws to Government Acquisitions |
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| Part 1423 | Part 1423 [Reserved] |
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| Part 1424 | Part 1424 – Protection of Privacy and Freedom of Information |
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| Part 1425 | Part 1425 – Foreign Acquisition |
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| Part 1426 | Part 1426 – Other Socioeconomic Programs |
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| Part 1427 | Part 1427 – Patents, Data, and Copyrights |
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| Part 1428 | Part 1428 – Bonds and Insurance |
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| Part 1429 | Part 1429 – Taxes |
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| Part 1430 | Part 1430 – Cost Accounting Standards Administration |
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| Part 1431 | Part 1431 – Contract Cost Principles and Procedures |
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| Part 1432 | Part 1432 – Contract Financing |
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| Part 1433 | Part 1433 – Protests, Disputes, and Appeals |
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| Part 1434 | Part 1434 [Reserved] |
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| Part 1435 | Part 1435 – Research and Development Contracting |
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| Part 1436 | Part 1436 – Construction and Architect–Engineer Contracts |
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| Part 1437 | Part 1437 – Service Contracting |
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| Part PARTS 1438–1441 [RESERVED] | Part 1438 – 1441 [Reserved] |
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| Part 1442 | Part 1442 – Contract Administration and Audit Services |
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| Part 1443 | Part 1443 – Contract Modifications |
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| Part 1444 | Part 1444 [Reserved] |
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| Part 1445 | Part 1445 – Government Property |
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| Part 1446 | Part 1446 – Quality Assurance |
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| Part 1447 | Part 1447 [Reserved] |
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| Part 1448 | Part 1448 – Value Engineering |
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| Part 1449 | Part 1449 – Termination of Contracts |
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| Part 1450 | Part 1450 – Extraordinary Contractual Actions and the Safety Act |
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| Part 1451 | Part 1451 – Uses of Government Sources by Contractors |
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| Part 1452 | Part 1452 – Solicitation Provisions and Contract Clauses |
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| Part 1480 | Part 1480 – Acquisitions Under the Buy Indian Act |
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| Part PARTS 1481–1499 [RESERVED] | Part 1481 – 1499 [Reserved] |
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