पञ्चाशद्भागो मानस्रावो द्रवाणाम् ॥ कZ_०२.१९.४४ ॥
pañcāśadbhāgo mānasrāvo dravāṇām
द्रवाणां मानस्रावः पञ्चाशद्भागः।
It creates a measurable tolerance band: inspectors can distinguish natural loss from deliberate under-filling, reducing arbitrary enforcement.