How a utility MSA is structured, and what a sub sees of it
A master service agreement sets terms and buys nothing. Work is authorized by a release: a purchase order at Southern California Edison, a contract work authorization at PG&E, a contract service order at a public agency. The release carries the dates, the ceiling and the scope. Edison's priority of documents ranks the agreement above the statement of work.
Page 1 of a Pacific Gas and Electric Company contract work authorization carries two contract numbers. One is the CWA's own. The other belongs to an agreement signed earlier, on a date printed in the opening sentence, that lives in a file somewhere else. The 2019 CWA PG&E issued to the City/County Association of Governments begins:
Issued under and pursuant to the Blanket Agreement or Master Service Agreement No. [Insert MSA no here] dated 01/01/2019 (the "MSA")
That CWA ran to a completion date of December 31, 2019 and capped PG&E's obligation at $318,808. The MSA above it supplied the terms. The dollars and the dates belonged to the CWA. Everything a contractor is held to sits in one of those two documents, and knowing which one is most of the job of reading either.
The agreement sets the terms, the release buys the work
Southern California Edison publishes a Master Services Agreement form used for third-party program implementers. Section 1.3 is the whole architecture in two sentences:
This Agreement does not by itself commit Edison or any of its Affiliates to purchase any Services or Deliverables from Implementer. This Agreement merely sets forth the terms and conditions that will govern the procurement of Services or Deliverables by Edison and/or its Affiliates through Purchase Orders issued under this Agreement.
The master agreement fixes how work will be bought. A separate instrument buys it. Three buyers, three names for that instrument.
Buyer | Master document | Work release | What the release fixes |
Southern California Edison | Master Services Agreement, or Terms and Conditions incorporated into a purchase order | Purchase Order, with Change Orders, Field Change Orders and Contractor Work Assignments under it | Authorized Amount, services schedule, statement of work |
Pacific Gas and Electric Company | Blanket Agreement or Master Service Agreement | Contract Work Authorization | Total not-to-exceed amount, completion date, scope |
San Francisco Public Works | Master as-needed agreement | Contract Service Order | Quoted price for one defined task |
PG&E's February 2025 announcement for crane, rigging and hauling services states the general scope the same way: the contractor performs "the Work requested by PG&E as described in a Contract Work Authorization." A firm holding a fully executed MSA and no release holds a rate card with signatures on it.
Which document wins when two of them disagree
Section 18.7 of Edison's MSA form ranks every piece of paper in the file:
the documents shall have the following priority: amendments to this MSA, from the most recent to the earliest; this MSA, including any exhibits, appendices, or attachments incorporated into or attached to this MSA; then, with respect to any Purchase Order, applicable Change Orders, from the most recent to the earliest, then FCOs and CWAs, from the most recent to the earliest, then the applicable Purchase Order; the Statement of Work or Specification; any other referenced documents in the Purchase Order.
Seven levels, and the scope of work is sixth.
Rank | Document |
1 | Amendments to the MSA, newest first |
2 | The MSA, with its exhibits, appendices and attachments |
3 | Change Orders, newest first |
4 | Field Change Orders and Contractor Work Assignments, newest first |
5 | The Purchase Order |
6 | The Statement of Work or Specification |
7 | Any other document referenced in the Purchase Order |
One qualification follows immediately. An inconsistency between a purchase order or change order and the MSA is resolved in favor of the purchase order or change order, "but only with respect to the subject matter and duration of that Purchase Order or Change Order." A release can beat the master agreement inside its own fence and nowhere else.
This is where a bid estimator loses money. The technical specification a bidder priced from is level six. An insurance limit or a records obligation sits in an exhibit at level two, governs the same work, and ranks four places above the specification.
The exhibits arrive already checked in
The execution sheet of Edison's MSA form is two pages of signature blocks and a list of ten exhibits. Each one carries the same construction:
Exhibit 1 Major Services Procurement [ ] Excluded If not checked, included.
The default is inclusion. A negotiator who leaves every box blank has signed all ten.
Exhibit | Subject |
1 | Major Services Procurement |
2 | Joint Procurement of Services |
3 | Heavy Hauling and Related Services |
4 | Metrology Services |
5 | Hazardous Material Services |
6 | Supplemental Terms, San Onofre Nuclear Generating Station |
7 | Line Construction Services |
8 | Buy America Compliance |
9 | Telephone Consumer Protection Act Compliance |
10 | Information Security, Cybersecurity, and Privacy Requirements for Suppliers |
Edison's Terms and Conditions for Services and Related Materials dated April 22, 2023 do the same thing for purchase orders that carry no separate MSA. Nine documents hosted on Edison's website are incorporated "unless expressly excluded in the applicable Purchase Order," among them the diverse business enterprise subcontracting program, hazardous material services, heavy hauling, and the cyber requirements. Then the sentence that sets the clock:
Prior to accepting the Purchase Order, Contractor must notify the Edison Representative and the Procurement Agent if Contractor is unable to meet any of these requirements. Contractor acknowledges that its failure to satisfy the requirements of these documents during the Term shall constitute a Contractor Event of Default.
The window to raise an exhibit you cannot meet closes at acceptance. After that, the same gap is a default. Insurance limits, bonding, diverse business enterprise subcontracting and flow-down obligations each live in an exhibit of their own, and each is a separate read.
Two terms, and they run on different clocks
The master agreement and the release expire independently. Edison's section 16.1 lets the agreement run open ended:
The term of the Agreement commences on the Effective Date and remains in effect until terminated by either Party in accordance with this Section 16 (the "Term").
Document | Term as written | What ends it |
Edison MSA form | From the effective date until terminated | Notice under section 16, or termination for convenience on 10 days notice under the services terms |
PG&E CWA, 2019 example | Effective on signature by both parties, expires December 31, 2019 | The printed completion date |
San Francisco master as-needed agreement M23 | 730 consecutive calendar days, extendable by up to 1,095 days to 1,825 days | The duration approved by the Public Works Commission |
San Francisco adds a rule that catches primes planning a backlog. The M23 agreements may run 1,825 days, and the last day for issuing a new contract service order falls at the end of year four. The final year exists to finish orders already placed.
Edison's terms also let the buyer stop the clock and restart it later. Section 15.8 permits Edison to order the contractor to suspend and later resume all or part of the services on at least 10 days notice, and makes the payment terms in that section the contractor's sole remedy for the suspension.
What the ceiling authorizes, and what Riverside spent
The number on the face of a master agreement is the most-misread figure in utility procurement. Riverside Public Utilities published the arithmetic. Its board memorandum of December 13, 2021 set out six years of a line clearance agreement with West Coast Arborists, Inc., awarded on November 6, 2015 under Request for Proposal No. 1515.
Contract year | Approved contract value | Actual costs incurred |
1 (2015/2016) | $2,400,000 | $1,862,053.88 |
2 (2016/2017) | $2,700,000 | $1,568,481.50 |
3 (2017/2018) | $2,700,000 | $2,004,781.75 |
4 (2018/2019) | $2,700,000 | $1,513,275.75 |
5 (2019/2020) | $2,700,000 | $2,559,122.18 |
6 (2020/2021) | $3,500,000 | $2,437,430.19 |
Total | $13,200,000 | $11,945,145.25 |
Every year came in under. Year 4 used 56 percent of its authorization. A crew plan sized to $2,700,000 in 2018 was sized to an authorization. The work that arrived cost $1,513,275.75.
San Francisco says the same thing in one line, in the announcement for its Master As-Needed Contract M04 Tree Services, which is open to certified tree service contractors holding a D-49 license:
There is no guarantee that a Contractor who has been awarded a master agreement will be awarded any CSOs.
Under San Francisco Administrative Code section 6.64, the master agreement is an entry ticket to a competition that has not happened yet. When work is needed, at least three master agreement holders are invited to quote, and the lowest responsive quotation may be awarded the contract service order. The staff report the Public Works Commission took up on January 9, 2025 lists the funding source for two $3,000,000 master agreements as "Dependent on CSO."
The reverse case is also real and also short. When Riverside's extension expired on October 31, 2021 and the replacement solicitation was canceled, the utility kept trimming going on a $25,000 purchase order while it sorted out the procurement.
Two signatures, and only one of them moves money
Edison's definitions document names two people, and a crew supervisor who confuses them works for free.
Edison Representative The Edison employee designated to direct, coordinate, expedite, inspect, and approve the Deliverables.
Procurement Agent The procurement agent responsible for a Purchase Order.
One directs the work. The other owns the document that pays for it. The Field Change Order is the seam between them:
Document issued at a Jobsite by Edison to Contractor which: authorizes a stated change to the Deliverables; states the estimated time and cost for time and material Services for the change; is signed by the Edison Representative and the Contractor representative; and is incorporated into a Purchase Order by a Change Order.
An FCO is signed at the jobsite by two people standing there. It reaches the purchase order only when a change order issued by the Procurement Agent puts it there. Section 3.2 of the MSA form states the consequence plainly:
Implementer shall not proceed with or be reimbursed for any Services performed or Deliverables provided either beyond the effective period of the applicable Purchase Order, or exceeding the Authorized Amount, without the written authorization of the Edison Representative, which is to be followed-up by a Change Order issued by the Procurement Agent.
PG&E's CWA form carries the same two-step in one sentence: any change to the authorized total "shall only be authorized in writing by a PG&E CWA Change Order, fully executed by both PG&E and Contractor." Acceptance runs the other way. Under section 3.5 of Edison's services terms, a contractor that simply performs the work in a purchase order has accepted that purchase order, even where the acceptance copy stays in a drawer.
What the agreement says about the second tier
Two clauses decide a subcontractor's position, and both sit in the prime's agreement with the utility.
Implementer shall not subcontract any portion of the Services or Deliverables without the prior written consent of the Edison Representative.
Implementer shall be solely responsible for the payment of any compensation, monies, wages or other payment due or allegedly due Subcontractors and said Subcontractors shall not seek payment (either directly or indirectly) from Edison or any Affiliate.
A subcontractor's counterparty is the prime, not the utility. Edison's definitions make the reach explicit: a Subcontractor is "an entity of any tier performing any portion of the Deliverables for Contractor," so a second-tier trimming crew is inside the consent requirement along with everyone above it. The prime remains liable for the acts and omissions of its subcontractors as though they were its own.
On public work the arrangement is different, because a statute intervenes. Under Public Contract Code section 4107:
A prime contractor whose bid is accepted may not: (a) Substitute a person as subcontractor in place of the subcontractor listed in the original bid, except that the awarding authority, or its duly authorized officer, may, except as otherwise provided in Section 4107.5, consent to the substitution of another person as a subcontractor in any of the following situations:
Nine enumerated situations follow, among them the listed subcontractor's refusal to execute a written contract at its bid price, its insolvency, and its failure to hold a license. The same subdivision gives that subcontractor a procedure. The awarding authority serves written notice of the substitution request by certified or registered mail.
The listed subcontractor then has five working days to file written objections, and silence "constitutes the listed subcontractor's consent to the substitution." A listed subcontractor on an agency contract holds its place against the awarding authority's judgment. A subcontractor under a utility MSA holds it against the prime's. What has to be true of that subcontractor before it can be listed at all is covered in public works contractor registration.
What a sub is allowed to read, and what the website has retired
Every page of Edison's MSA form carries the word Confidential in the footer. Most primes treat the master agreement the same way, and a subcontractor is usually handed an incorporation-by-reference list in its place. The non-disclosure section anticipates the request.
Section 9.2 permits disclosure to a third party that is "informed of the information's confidential nature and agree[s] to meet the non-disclosure and use restrictions in this Agreement," where the purpose is performing the work. Asking in writing for the clauses that bind your scope is a request the agreement already contemplates, and the answer arrives under a non-disclosure agreement.
What a sub can find on its own has a shorter shelf life than it looks. Edison's supply chain management page still hosts the transactional terms, the definitions and the exhibits, above this note:
NOTE: The Transactional Term & Conditions, the Transactional Terms and Conditions Exhibits, and the Definitions have been sunset and are only in use for existing Purchase Orders. Effective April 1, 2025, new Purchase Order Terms & Conditions are in place. Suppliers should reach out to their SCE Procurement contacts for copies, if requested.
The published set governs purchase orders issued before April 1, 2025. The set governing a purchase order issued after that date lives with the procurement contact, and Edison's own instruction is to ask for it. Pricing a 2026 scope against a 2023 document is reading a superseded regime with confidence. The same discipline applies to the contractor safety prequalification that gates the work in the first place, covered in ISNetworld grades.
The clauses that outlive the last closed unit
Three deadlines run after the crew leaves, and a subcontractor inherits all three through its subcontract.
180 days to invoice. Under section 3.1 of the MSA form, a contractor that fails to submit a valid invoice within 180 days of performing the services waives its right to payment for them.
Three years of records access. Section 17.1 gives Edison the right to examine, inspect or copy the contractor's books, records and documents during the agreement "and for a period of three (3) years thereafter." The access runs on five days prior notice, and it extends to interviews of employees who might reasonably have information related to those records. What else is running on that file, and for how long, is covered in recordkeeping and retention.
Transition assistance after termination. Under section 15.7 of the services terms, the contractor must on request keep providing the services past the termination date so the handover runs continuously, paid at agreement terms.
Section 17.1 also draws a line the other way:
Edison will not audit the component parts of the unit rate or fixed fee when particular Services or furnishing of Deliverables are performed on a unit price or fixed fee basis.
Once a price is a unit price, the buildup behind it is out of reach. That is one of the real consequences of choosing a unit over an hour, and it is why a time and materials line and a per-tree line carry different audit exposure. Separately, the state's own review of a utility's wildfire mitigation work reaches records held by contractors performing that work, which is covered in Energy Safety audits.
Where this lands on a contract
Eight things decide what an executed master agreement is actually worth, and all eight are readable before the first crew is dispatched.
What to pin | Where it comes from |
Whether a release exists | The purchase order, CWA or CSO number, not the MSA number |
The release's ceiling and end date | The face of the release, which is where both live |
Order of precedence | The priority of documents clause, and where the statement of work falls in it |
Which exhibits are in | The execution sheet checkboxes, plus any list incorporated unless expressly excluded |
Who may authorize more work | The named representative, and the named procurement agent who has to follow up with a change order |
Whether subcontracting is consented to | The written consent on file, for every tier |
The invoice deadline | The waiver clause, counted from performance of the services or acceptance of the deliverables |
The records window | The audit clause, counted from the end of the agreement |
The pattern holds across buyers with little else in common. A utility signs the terms first and issues the money later, in a short document the contractor accepts as written. A city awards a master agreement and then runs a second competition for each task. In both, the document a contractor celebrates signing is the one that promises the least, and the document that binds a crew on a Tuesday morning is a release naming a scope, a date and a number.
Further reading
Utility prequalification: what evaluators actually check: How a public agency decides who is eligible for a master agreement, and why an investor-owned utility runs a different gate.
Public works contractor registration: What a subcontractor has to hold before a prime can list it under an agency master agreement.
How Energy Safety audits vegetation management: Why the records clause in a utility agreement reaches work performed on the utility's behalf.
Frequently asked questions
Does signing a master service agreement guarantee any work?
No. Southern California Edison's published Master Services Agreement form states that the agreement does not by itself commit Edison or its affiliates to purchase any services, and that it merely sets the terms that will govern procurement through purchase orders issued under it. San Francisco Public Works puts the same point in its tree services solicitation: there is no guarantee that a contractor awarded a master agreement will be awarded any contract service orders.
What is the difference between an MSA and a CWA?
The MSA is the terms. The CWA is the work. A Pacific Gas and Electric Company contract work authorization is issued under and pursuant to a named master service agreement, and states its own term, its own scope and its own not-to-exceed total. The 2019 CWA PG&E issued to the City/County Association of Governments expired on December 31, 2019 and capped PG&E's obligation at $318,808. The MSA it was issued under carried no dollar figure.
If the statement of work and the master agreement conflict, which controls?
Under section 18.7 of Southern California Edison's Master Services Agreement form, the master agreement and its exhibits rank above the purchase order and above the statement of work. Amendments to the MSA rank highest, then the MSA itself, then change orders, then field change orders and work assignments, then the purchase order, then the statement of work. A purchase order or change order can override the MSA, but only for its own subject matter and duration.
Can a prime put a subcontractor on utility work without telling the utility?
Not under these terms. Section 4.8 of Southern California Edison's MSA form requires the prior written consent of the Edison Representative before any portion of the services is subcontracted, and the sunset Transactional Terms and Conditions for Services carried the same requirement at section 3.9. Edison's definitions document defines a subcontractor as an entity of any tier, so the consent requirement reaches below the first tier.
Is a utility MSA a public document?
Usually not. Southern California Edison's MSA form carries the word Confidential in the footer of every page. Section 9.2 of that form permits a party to disclose confidential information to a third party that is informed of its confidential nature and agrees to the same restrictions, where the disclosure is necessary to perform the work. A subcontractor asking to read the clauses that bind it is making a request the non-disclosure section already contemplates.
