Three Phases

The PCL uses a graduated model. Permissions start broad. Restrictions deploy only when specific risk thresholds are crossed.

Phase 1 — Open Foundation

Under normal conditions, the PCL grants broad, permissive access. This is the default state.

You may

You must

Phase 1 feels like any other permissive open license. The work flows freely. The only obligations are baseline expectations of honest attribution and license preservation.

Phase 2 — Conditional Restrictions

Phase 2 restrictions deploy automatically when use of the work crosses into territory that threatens the spirit of open contribution. These are proportional responses to detected risk.

Triggers

Effects

Phase 3 — Full Protection

Phase 3 is the last resort. It deploys when the use of the work is actively harmful — destructive to the integrity of the original contribution or dangerous to the public.

Triggers

Effects