Aerial view of a tanker's deck and helideck

Key takeaways

  • Identify the accepted specification and delivery-point basis.
  • Check that supporting evidence addresses the proposed parcel and question.
  • Separate fuel quality from origin and environmental claims.
  • Obtain qualified acceptance of substantive product changes.

Use the standard's scope accurately

ISO 23306 addresses marine LNG quality requirements at the delivery point of custody transfer. ISO 23306 abstract

This brief scope statement is not a substitute for the applicable current text or the responsible team's acceptance criteria. Confirm the actual edition and terms incorporated into the purchase rather than assuming that naming a standard resolves every technical question.

Busan City's New Port information identifies separate terminal facilities. Busan New Port information

Connect the proposed product evidence to the actual service arrangement. The port name alone does not identify the seller's delivery commitment or the parcel being reviewed.

For a current transaction, the delivery-point specification review is not provided; obtain current verified information. Record the accepted specification, actual supply reference, relevant evidence, responsible review and unresolved conditions.

Define the commitment before assessing the paperwork

The supplier's offer should clearly state what product basis it accepts and where the relevant delivery obligation applies. Procurement should obtain that statement without drafting its own technical acceptance limits.

The responsible qualified team determines the specification and any supplementary requirements. If the seller proposes an exception, identify it explicitly instead of leaving it buried in a product sheet while the commercial summary says fully compliant.

An exception may be acceptable after review, but it should remain a proposed alternative until the required acceptance is recorded. A favourable price does not answer the technical question.

Ask what each supporting document establishes

A general product description can explain a supplier's offering without proving the characteristics of the actual parcel. An earlier analysis may be informative without addressing a later supply. The reviewer needs the evidence's scope and connection to the transaction.

Ask which product, period or supply reference the document concerns and which accepted requirement it supports. Where that connection is incomplete, request appropriate clarification through the responsible technical review process.

Do not decide that a document is sufficient simply because it contains more parameters or looks more detailed. Relevance to the agreed question matters more than the number of fields in the attachment.

A delivery-point specification matrix

Evidence or termReview questionCommercial consequence
Accepted standard and editionWhat exact basis forms part of the order?Defines the promised product scope
Supplementary requirementHas the supplier expressly accepted it?Prevents an unresolved condition appearing closed
General product descriptionIs it descriptive or transaction-specific?Limits the conclusion it can support
Parcel-related evidenceDoes it connect to the intended supply?Supports the responsible product review
Proposed exceptionWhat changes and who may accept it?Requires an explicit alternative decision
Environmental attributeWhich separate claim is supported?Avoids inferring origin or reporting eligibility from quality alone

Fictional case: an origin description is mistaken for acceptance

A fictional Busan buyer receives an LNG offer with an extensive explanation of the product's source. The commercial team interprets the description as sufficient evidence that the requested fuel basis has been accepted.

The qualified reviewer identifies a missing connection between the proposed supply and a supplementary condition in the enquiry. The origin description does not resolve that condition.

The buyer requests a direct response to the accepted requirement and relevant supporting evidence. If the supplier cannot provide it, the offer remains conditional or becomes an alternative requiring review. The decision is based on the actual product obligation, not the length or apparent sophistication of its background description.

Keep environmental attributes separate

Fuel quality, source description and environmental accounting are distinct questions. A product can be described on one basis without establishing every claim the buyer wishes to make about it.

If the purchase includes a specific environmental attribute, identify the contractual claim and the evidence required for the intended use. Obtain appropriate qualified review of any reporting or regulatory interpretation and check the current applicable text.

Do not assume that a quality specification proves a particular origin or emissions outcome. Equally, an environmental certificate should not substitute for the accepted product-quality evidence.

Review changes at the level that matters

A supplier may change a descriptive label without changing the accepted product commitment. Alternatively, a short message may propose a substantive change in specification, parcel or supporting evidence. Establish which situation applies.

Procurement should describe the difference clearly and obtain the necessary technical and commercial response. It should not prescribe how the vessel accommodates a different fuel or infer technical acceptance from continued schedule discussions.

Once the basis is accepted, preserve it with the order and relevant evidence. Later delivery and invoice reviewers should be able to identify the agreed product without reconstructing several competing descriptions.

Common mistakes

Avoid treating an origin description as proof of the accepted specification, overlooking supplier exceptions and using unrelated historical evidence as if it addressed the current parcel. Other errors include assuming a quality standard establishes environmental attributes or interpreting a continued commercial discussion as technical acceptance.

Where Zeaclub fits

Zeaclub supports agentic, AI-assisted operations with a human in control.

Zeaclub provides a multi-party shared workspace for owners, charterers, brokers and port agents.

Explore Zeaclub

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Educational information only; not legal, financial or trading advice. Contract wording and applicable rules control. Verify current requirements and obtain qualified advice before acting.

Frequently asked questions

Does naming ISO 23306 complete the specification review?

No. Confirm the applicable text, accepted edition, supplementary conditions and qualified assessment of the actual proposition.

Can a general product sheet be useful?

Yes, within its stated scope. It should not be represented as answering a transaction-specific question it does not address.

Does quality evidence prove environmental eligibility?

No. Establish the separate claim, evidence and applicable review requirements.

What belongs in the specification slot?

Record the accepted basis, supply reference, relevant evidence, proposed exceptions and responsible acceptance status.

Primary sources