Subchapter A - General General Services Administration Acquisition Manual General Services Administration Acquisition ManualPart 501 - General Services Administration Acquisition Regulation SystemSubpart 501.1 - Purpose, Authority, Issuance501.101 Purpose.501.103 Authority.501.104 Applicability.501.105 Issuance.501.105-1 Publication and code arrangement.501.105-2 Arrangement of regulations.501.105-3 Copies.501.106 OMB Approval under the Paperwork Reduction Act.Part 502 - Definitions of Words and TermsSubpart 502.1 - Definitions502.101 Definitions.Part 503 - Improper Business Practices and Personal Conflicts of InterestSubpart 503.1 - Safeguards503.104 Procurement integrity.Part 504 - Administrative MattersSubpart 504.4 - Safeguarding Classified Information Within Industry504.402 General.504.475 Return of classified information.Subpart 504.5 - Electronic Commerce in Contracting504.500 [Reserved].504.502 Policy.504.570 [Reserved].Subpart 504.6 - Contract Reporting504.605-70 Federal Procurement Data System Public–Access to Data.Subpart 504.11 - System for Award Management504.1103 Procedures.Subpart 504.13 - Personal Identity Verification of Contractor Personnel504.1301 Policy.504.1303 Contract clause.