Rule 215 of the GFR, 2017 — the 20,000 and 50,000-volume slabs, complete versus sample verification, the loss of five per thousand issued, the books that must always be investigated, and the procedure for a school library.
THE SLAB SYSTEM
Rule 215(i) — how often you must verify
The frequency of verification depends ENTIRELY on the SIZE of the library — the number of volumes it holds.
| Size of library |
Type of verification |
How often |
| Not more than 20,000 volumes |
COMPLETE physical verification |
EVERY YEAR |
| More than 20,000 and up to 50,000 volumes |
COMPLETE physical verification |
At least once in THREE YEARS |
| More than 50,000 volumes |
SAMPLE physical verification |
At intervals of not more than THREE YEARS |
The exact words of the Rule
"Complete physical verification of books should be done every year in case of libraries having not more than twenty thousand volumes. For libraries having more than twenty thousand volumes and up to fifty thousand volumes, such verification should be done at least once in three years. Sample physical verification at intervals of not more than three years should be done in case of libraries having more than fifty thousand volumes. In case such verification reveals unusual or unreasonable shortages, complete verification shall be done."
1.1 The three things to notice
① The slab changes TWO things at once, not one.
Going from the first slab to the second changes the frequency — yearly becomes three-yearly.
Going from the second to the third changes the TYPE — complete becomes sample.
⚠️ The commonest mistake is to think only the frequency changes. A library of 60,000 volumes does not do a complete verification every three years; it does a sample verification.
② The safety valve — the sentence most notes leave out.
"In case such verification reveals UNUSUAL OR UNREASONABLE SHORTAGES, COMPLETE VERIFICATION SHALL BE DONE."
So a sample verification is not the end of the matter. If the sample throws up a shortage that looks abnormal, the library must go on to a complete count. Note the word — "shall", not "may". It is mandatory.
③ The thresholds are expressed carefully.
"NOT MORE THAN twenty thousand" → a library of exactly 20,000 falls in the first slab and verifies every year.
"MORE THAN twenty thousand and UP TO fifty thousand" → a library of exactly 50,000 falls in the second slab.
"MORE THAN fifty thousand" → only 50,001 and above moves to sample verification.
1.2 A memory device
20,000 → every year, complete
50,000 → every three years, complete
Above 50,000 → every three years, SAMPLE
The pattern: the bigger the library, the less often and the less thoroughly — because counting half a million books annually would close the library for months. The rule trades completeness for practicability, and buys back the risk with the "unusual shortage" safeguard.