अनेनैवोपायेन नान्येन इति नियोगः ॥ कZ_०९.७.७४ ॥
anenaivopāyena nānyena iti niyogaḥ
«Par ce moyen seul, et non par un autre» : telle est la prescription fixe (niyoga).
When the situation has a clear best instrument and deviation increases risk—policy is mandated rather than discretionary.