GSA published MAS Refresh 33 on October 2, 2026, as a modification to solicitation 47QSMD20R0001. Contractors have 90 days from the issuance of the mass modification to accept the changes. This refresh introduces a new supply chain risk monitoring clause, expands FASt Lane eligibility beyond the IT category for the first time, adds a product substitution prohibition across the solicitation, integrates updated wage determinations, and delivers targeted SIN-level changes across Facilities, IT, Miscellaneous, and Travel large categories. In this blog, we break down every significant change from the official Refresh 33 document so MAS contractors can assess their compliance obligations before the acceptance deadline.

Acceptance Deadline and Effective Date

Contractors must accept the mass modification no later than 90 days after it is issued. Changes incorporated in this modification apply to all new tasks and delivery orders issued after the modification’s effective date. This includes orders under existing BPAs. Orders issued before the effective date remain under the terms in effect at the time of award.

Key Changes to the Overall MAS Solicitation

1. New Clause: Supply Chain Risk Monitoring (552.540-71)

Refresh 33 adds GSAR clause 552.540-71, Supply Chain Risk Monitoring (July 2026), to the MAS solicitation. This is the most operationally significant change in the refresh for contractors offering products or technology solutions.

The clause states that the government monitors supply chain risk information as defined in FAR 40.101 throughout contract performance. If GSA identifies supply chain risks that cannot be reasonably mitigated, it can take corrective action, including:

• Removing the product, service, or solution from the contract
• Not extending contract performance
• Canceling the contract
• Terminating the contract

This clause formalizes GSA’s existing supply chain security posture into a binding contractual obligation. Contractors offering products, particularly technology, hardware, and software, must now assess their supply chain documentation and vendor disclosure practices. GSA’s implementation is part of the broader RGO initiative to integrate supply chain requirements into the GSAR Part 540 framework, establishing a consistent, agency-wide approach to supply chain risk management.

GSA notes that additional details, examples of supply chain risks, and FAQs are available on GSA.gov under the Supply Chain Security section of the GSA Resources tab.

2. FASt Lane Eligibility Expansion

Refresh 33 expands FASt Lane eligibility to all MAS Large Categories for the first time. Previously, FASt Lane was limited to the IT Category (ITC). This change is significant for contractors outside IT who need faster processing for new schedule offers.

What is changing:

• FASt Lane eligibility now opens to all MAS categories
• For categories other than ITC, FASt Lane eligibility applies to offers only not modifications
• Qualifying offerors in non-IT categories can seek FASt Lane consideration when agency requirements are supported by verifiable, documented customer demand through agency sponsorship

What is not changing:

• Startup Springboard participation remains limited to approved FASt Lane participants
• Current FASt Lane eligibility requirements and participation standards continue to apply
• FASt Lane modification processes remain limited to the IT Category and apply only to designated FASt Lane-eligible initiatives

Important: Offerors with pending submissions not yet submitted must initiate a new application through the eOffer portal to maintain FASt Lane eligibility under the expanded criteria.

For non-IT contractors with a validated federal agency requirement, this change opens a faster path to schedule award that did not exist before Refresh 33.

3. Product Substitution Prohibition

A new requirement now applies across all MAS Large Category solicitation attachments. Specifically, product substitutions are prohibited without the buyer’s prior written consent. All authorized substitutions must be listed on the MAS contract and priced no higher than the original item. The only exception is where the customer explicitly approves a more expensive MAS-listed alternative.

This change adds a compliance layer for contractors managing product catalogs with frequent manufacturer updates, discontinuations, or model transitions. Contractors should review their substitution practices and ensure their contract modification processes align with this new requirement before the effective date.

4. Service Contract Labor Standards Wage Determinations

Refresh 33 integrates the most recent wage determinations for Service Contract Labor Standards (SCLS). Contractors with service-based schedule offerings should verify that their pricing and labor rates reflect the updated determinations applicable to their service categories and geographic performance areas.

5. TAA Exemption Removal: Federal Prison Industries and AbilityOne

Class Deviation CD-2026-03 eliminates the Trade Agreements Act exemption previously applicable to Federal Prison Industries, Inc. (UNICOR) and AbilityOne Participating Nonprofit Agencies. Contractors who include products from these sources in their MAS offerings must assess TAA compliance implications.

SIN-Specific Changes

1. Facilities Large Category (B)

• SIN 238160 — Roofing Products and Services Solutions

The SIN description expands to clarify that this SIN may satisfy requirements for materials only, services/labor only, or a comprehensive combination of both. The update makes standalone roofing services explicitly within scope. Contractors offering roofing services without an associated materials component can now use this SIN without scope ambiguity.

• SIN 532490P — Lease/Rental of Pre-Engineered/Prefabricated Buildings and Structures

This SIN receives a significant scope expansion. The revised description adds pre-engineered, modular, and tension fabric structures to the covered product types. More importantly, it formalizes the inclusion of turnkey base camp facilities and integrated operational support services, including laundry, housekeeping, and restroom/shower servicing, when provided as part of an integrated solution directly related to leased or rented temporary structures.

Two SIN subgroups are affected:

• New subgroup: Turnkey Base Camp Facilities and Operational Support Products or Services
• Modified subgroup: Lease/Rental of Pre-Engineered/Prefabricated Restrooms, Showers, and Utility Rooms

Note: Meals, dining facility operations, and food services are within scope only as part of a total turnkey base camp solution. They may not be offered as standalone services under this SIN.

2. Miscellaneous Large Category (G)

• SIN 4PL (Complementary SINs Subcategory G06)

A new SIN note clarifies that, although food and beverages remain out of scope for the MAS program, the unique requirements of the 4PL SIN permit the inclusion of bottled water.

• SIN 238910 — Installation and Site Preparation Services

A new SIN note establishes that ancillary services, incidental products, and equipment rentals may only be ordered in conjunction with, and in direct support of, products or services purchased under the schedule contract. Incidental products must be priced separately and may be ordered only alongside services purchased under this SIN.

3. Information Technology Large Category (F)

• SIN 517312 — Wireless Mobility Solutions (Telecommunications Subcategory F09)

Refresh 33 adds three new subgroups to SIN 517312. New offerors and existing FSS contractors may request placement under any of these subgroups, subject to technical review and GSA approval:

• Managed Mobility Services: End-to-end lifecycle management for enterprise mobile devices and wireless endpoints, including MDM, MAM, MCM, MTP, and UEM; device procurement, provisioning, activation, and deactivation; security policy enforcement; and support for GFE, COPE, COBO, and BYOD configurations.
• Managed Wireless Service: End-to-end management of commercial wireless connectivity across cellular, Wi-Fi, Li-Fi, Fixed Wireless Access, private wireless networks, and satellite-enabled wireless communications. Covers provisioning, activation, installation, configuration, monitoring, security policy implementation, performance optimization, troubleshooting, reporting, and lifecycle management.
• Enterprise Access, Connectivity, and Transport Services: Enterprise-grade WAN, MAN, and LAN environments providing secure access to the Internet, cloud environments, and private networks through Carrier Ethernet, broadband, fiber, optical transport, and managed wireless, satellite, or Wi-Fi/Li-Fi services.

IT contractors with managed mobility, wireless, or enterprise connectivity offerings should evaluate whether these new subgroups apply to their current schedule and initiate a modification if applicable.

4. Travel Large Category (L)

SIN 531 — Employee Relocation Solution (L01)

The Statement of Work guidelines are being revised to ensure compliance with updated audit and payment standards for household goods relocation services under FMR 102-118.

SIN 561510 — Travel Agent Services (L03)

This SIN receives substantial updates to both the Statement of Work and the Price Proposal Template:

• Section 6 now includes a new subsection (6.3) for Transactional Data Reporting
• New DoD/Department of War CLINs added, including IFF transactions
• SLA metrics reporting moved to monthly, quarterly, and annual business reports, now required for both agencies and the TMC PMO
• IFF reporting updated from quarterly to monthly
• Seven new terms added to definitions covering proposed DoD services
• New VIP (Remote or Hybrid) section added (Section 10.18 and Section 14.4)
• New customer satisfaction rating requirement: at least 85% based on a standardized government survey delivered by the GSA TMC PMO
• New Section 18 covering DoD background information and required services
• Seven new CLINs for DoD operations added to the Price Proposal Template
• All references to Most Favored Customer and Most Favored Agency removed from the PPT

Travel Agent Services contractors with DoD agency clients should review these changes carefully. The new DoD CLINs and reporting requirements represent a substantive operational change that will require updates to pricing submissions and account management workflows.

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Key Takeaways

• Contractors have 90 days from the mass modification issuance to accept Refresh 33 changes
• GSAR clause 552.540-71 adds a binding supply chain risk monitoring obligation. GSA can remove products, cancel contracts, or terminate agreements if unmitigated supply chain risks are identified
• FASt Lane eligibility now extends to all MAS categories for new offers, not just IT. Non-IT offerors with validated agency requirements can now access expedited processing
• Product substitutions now require prior written buyer consent and must be priced no higher than the original item
• SIN 238160 explicitly includes standalone roofing services; SIN 532490P expands to cover turnkey base camp facilities with integrated operational support
• SIN 517312 adds three new wireless mobility subgroups covering managed mobility services, managed wireless services, and enterprise connectivity
• SIN 561510 Travel Agent Services adds DoD-specific CLINs, monthly IFF and SLA reporting, a new VIP section, and an 85% customer satisfaction requirement

What Contractors Should Do Now

All MAS contractors:

• Monitor your contract modification notification for the Refresh 33 mass modification
• Accept the modification within 90 days of issuance
• Review the new supply chain risk clause and assess documentation readiness
• Confirm that product substitution practices comply with the new prohibition

Non-IT contractors with urgent agency requirements:

• Evaluate FASt Lane eligibility under the expanded criteria
• If a pending submission exists, initiate a new application through eOffer to maintain FASt Lane eligibility

Facilities contractors:

• Review SIN 238160 and SIN 532490P scope changes against current offerings
• Assess whether the new Turnkey Base Camp subgroup applies to your schedule

IT contractors:

• Review the three new SIN 517312 subgroups
• Initiate a modification if managed mobility, wireless, or enterprise connectivity offerings align with the new subgroup definitions

Travel contractors:

• Review the full SIN 561510 SOW and PPT revisions
• Update pricing submissions to reflect new DoD CLINs
• Align account management reporting workflows with the new monthly SLA and IFF requirements

For MAS contractors who need support reviewing Refresh 33 compliance implications, managing mass modification acceptance, assessing supply chain clause obligations, or navigating SIN-level changes across their schedule portfolio, iQuasar’s GSA MAS services team provides hands-on contract management and compliance support. Contact us today to stay compliant and ahead of every refresh deadline.

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