चतुर्मासिकं प्रातिवेधनिकं कारयेत् ॥ कZ_०२.१९.४० ॥
caturmāsikaṃ prātivedhanikaṃ kārayet
He shall have the verification/marking (prātivedhanika) carried out every four months.
It operationalizes continuous compliance: frequent enough to deter tampering and drift, but periodic to keep administrative burden manageable.