Admitting a new participant is an exercise in proportion. Too little access and the member cannot serve real business; too much and the network carries risk the member has not yet demonstrated it can manage. Tiered participation resolves the tension by matching limits, corridors and monitoring to the outcome of due diligence, and then adjusting them as evidence accumulates. This is a design question regulators and compliance teams are right to take seriously.

Let diligence set the starting tier

The entry tier should follow the admission outcome, not a uniform default. An institution with strong controls, clear ownership and relevant corridor experience may begin with broader access than one whose profile is harder to read. The tier is a judgement recorded in writing, with the reasoning visible to the network.

Three controls that move together

Access is not a single dial. Three parameters should advance together:

  • Limits — per-operation and cumulative ceilings, set conservatively at entry.
  • Corridors — the specific markets and currencies a member may serve.
  • Monitoring — the depth and frequency of oversight applied to its operations.

Raising one without the others creates gaps. A member with higher limits but unchanged monitoring simply has more room to be wrong, and a member with broader corridors but unchanged limits may be unable to serve the business those corridors attract.

Make escalation active

Limits should not fail silently. Over-limit operations become human approval requests rather than rejections, so a member is not penalised for legitimate growth while the network retains control of the exception.

Adjust, and be willing to go down

Tiers should be able to move in both directions. Evidence supports promotion; adverse signals — selective audit findings, network anomalies, unresolved issues — support reduced limits, suspension and ultimately exclusion.

In short

  • The admission outcome should set the entry tier, not a uniform default.
  • Limits, corridors and monitoring must move together.
  • Over-limit operations become approvals, not silent rejections.
  • Tiers should rise with evidence and fall with adverse signals.
  • The consequences ladder ends in suspension or exclusion.

Review how participation rules are set at /protocol/.