द्वादशपणममुद्रो जानपदो दद्यात् ॥ कZ_०२.३४.०३ ॥
dvādaśapaṇam amudro jānapado dadyāt
द्वादशपणम् अमुद्रः जानपदः दद्यात्।
Differential pricing to segment movement/transactions: the state can encourage, discourage, or more closely monitor certain classes of travellers while funding enforcement.