वारणाज्ञानयोर्निर्दोषः ॥ कZ_०३.४.०८ ॥
vāraṇājñānayor nirdoṣaḥ
There is no culpability in cases of prevention (acting to stop it) or ignorance (lack of knowledge/intent).
It signals that liability depends on knowledge/intent; enforcement should distinguish deliberate facilitation from unknowing involvement.